Holy Unblocker provides browser-based proxy access to websites, but like any web proxy it can stop working as expected. You might see a blank screen, a site that won't load, a connection error, slow performance, broken images or missing buttons.
These problems don't always mean Holy Unblocker is down. The cause can be your browser, the destination website, the proxy engine, transport configuration, server load, your network or a compatibility issue. This guide covers 10 common problems in 2026 with practical fixes.
Note: Holy Unblocker LTS continued as InvisiProxy LTS, so some troubleshooting applies to the newer implementation and its components, including Scramjet, Ultraviolet and different transports. See Holy Unblocker vs InvisiProxy.
1. Holy Unblocker Is Not Loading at All
You may see a blank page, a browser timeout, "This site can't be reached", connection refused, DNS errors or a loading screen that never finishes.
Why it happens
The public instance may be unavailable or overloaded, the domain may have changed, or there may be a network or DNS problem. Corrupted cache or service-worker data in your browser can also cause it.
How to fix it
- Refresh, then hard refresh (Ctrl + F5 on Windows).
- Try another browser. If it works there, the cause is your original browser's cache, extensions or stored site data.
- Check your connection by opening several normal websites. If they fail too, Holy Unblocker isn't the problem.
- Try again later. If only this deployment is unavailable, it may be down for an outage or maintenance.
2. Holy Unblocker Shows a Blank Screen
The main interface loads, but the site you requested stays white. Possible causes include JavaScript compatibility problems, proxy rewriting issues, service-worker problems, browser restrictions, website-specific incompatibility, cached proxy data or the selected proxy engine. Modern sites are applications built on JavaScript, APIs, cookies and WebSockets, not simple HTML pages.
- Reload, then exit and enter the destination again.
- Clear site data for the Holy Unblocker deployment.
- Try another browser to see if it is browser-specific.
- Try another proxy engine if available. InvisiProxy includes Scramjet and Ultraviolet, and compatibility can differ between them. If one fails and another works, the issue is that site's compatibility with the engine. See Holy Unblocker vs Scramjet.
3. Holy Unblocker Is Extremely Slow
Symptoms include slow loading, delayed images, video buffering, slow JavaScript and high latency. Proxying adds a layer: instead of your browser → website, the path is your browser → proxy → website. A server far from you adds more latency.
- Choose a closer region if the deployment offers region selection.
- Close unnecessary tabs. JavaScript-heavy proxied sites use a lot of CPU and memory.
- Test a simple website. If simple sites are fast and complex apps are slow, it's site-specific.
- Try another transport (Epoxy or Libcurl) if offered, which may improve compatibility or speed.
4. A Website Opens but Some Features Don't Work
Login fails, images are missing, buttons don't respond, search breaks, videos won't play, menus won't open, downloads fail or some pages stay blank. Sites depend on JavaScript, API requests, cookies, WebSockets, service workers, browser storage, content-security policies and cross-origin requests, and if one piece isn't compatible with the proxy environment, part of the site breaks.
- Reload, then reopen the site through the proxy.
- Try another browser and another available engine.
- Clear the site's stored data.
- Test a different website.
If other sites work and only one doesn't, it is probably site compatibility rather than a full outage.
5. Holy Unblocker Says Connection Failed
This appears when the proxy can't establish or keep communication with the destination. Causes include destination-server restrictions, proxy-server problems, network instability, DNS problems, transport failure, overload or website-side blocking.
- Check whether the destination works without the proxy. If it is down, Holy Unblocker can't fix that.
- Try another website through the proxy.
- Every site fails: the deployment, browser or network is the likely cause.
- One site fails: it may be incompatible with the proxy or actively restrict proxy traffic. Changing browser settings won't fix a site-side restriction.
6. It Works on One Browser but Not Another
Holy Unblocker may work in Chrome but fail in Firefox, or behave differently on mobile. Browsers implement web technologies differently, and proxies depend on service workers, JavaScript and storage APIs, WebSockets, fetch requests and security policies. The InvisiProxy roadmap includes Firefox and mobile compatibility work.
- Update the browser and restart it.
- Temporarily disable extensions.
- Clear site data.
- Test a second browser and compare. If it works elsewhere, you've found a browser-specific issue.
7. It Stops Working After a Browser Update
Updates can change service workers, storage, cross-origin behavior, JavaScript APIs, network requests and security restrictions, so a previously working proxy can hit new compatibility problems.
- Fully close and reopen the browser.
- Clear the site's cached data and reload.
- Test another browser, and check whether it happens on multiple devices.
- If you self-host, check the project's documentation and updates.
Avoid immediately changing advanced browser security settings. Changing controls you don't understand can create more problems.
8. It Doesn't Work on Mobile
You might see blank pages, slow loading, unresponsive buttons, constantly reloading sites, missing content or connection errors. Mobile browsers have different restrictions and API implementations, and phones have fewer resources than most computers, so a complex proxied site can use substantial CPU and memory.
- Update your mobile browser.
- Close other tabs to free memory.
- Clear site data.
- Try another mobile browser.
- Test a lightweight website to see whether the issue is general or site-specific.
9. It Works, but Videos or Games Don't
Video and browser games are among a proxy's more demanding workloads. They can need large transfers, low latency, persistent connections, JavaScript execution, WebSockets, media APIs and CPU, while the proxy adds processing and network distance.
- Confirm ordinary websites work first.
- For games, try a lightweight HTML5 game before a demanding multiplayer one. See Holy Unblocker Games.
- For video, check whether the destination's streaming system is compatible with the proxy environment.
Don't assume every game or video platform will work on every deployment. Compatibility varies considerably.
10. It Suddenly Stops Working
The most frustrating case: it worked yesterday and doesn't today, even though you changed nothing. Destination sites constantly add new JavaScript, security policies, APIs, anti-proxy measures, authentication systems and media systems, and the proxy project itself changes through updates to dependencies, engines, transports and browser compatibility.
- Reload the proxy and test another website.
- Try another browser and clear site data.
- Test another available engine and compare.
- Check whether the destination works normally without the proxy.
- If you run your own installation, check the documentation and release information.
Quick Troubleshooting Checklist
Basic checks
- Refresh and hard refresh the page
- Check your internet connection and try another website
- Try and update another browser
- Clear site data and temporarily disable extensions
Proxy checks
- Try another proxy engine, transport or region if offered
- Wait and retry if the server may be overloaded
Website checks
- Open the destination without the proxy
- Try a different destination
- Check whether only one feature is broken, or whether the site uses heavy JavaScript, video or real-time features
Self-hosted installations
- Check server status, logs and resources
- Verify dependencies, proxy and transport configuration
- Check for software updates and version-specific changes in the documentation
Our self-hosting section covers setup if you run your own instance.
How to Tell Where the Problem Is
Isolating the problem avoids unnecessary setting changes:
Should You Clear Cache or Disable Extensions?
Cache: sometimes. Cached files go stale, especially after a deployment update, but clearing your entire history is usually unnecessary. Clear site-specific data for the affected deployment, reload and retest. If it disappears, stale resources were the cause.
Extensions: as a test, yes. Privacy extensions, content blockers and security extensions can interfere with JavaScript, requests, cookies or service workers. Try a private window or disable extensions temporarily, then re-enable them one at a time to find the conflict.
What If Nothing Fixes It?
Decide whether the problem is local or server-side by trying another browser, device, network and destination. If it happens everywhere, suspect the deployment or server. If it happens only on one device, look at that device's browser and network. If it happens with only one site, it's compatibility. For self-hosted installs, server logs and the documentation come next. You can also read about what each feature does to see which setting may matter.
Frequently Asked Questions
Why is Holy Unblocker not working?
Browser compatibility, cached data, server problems, network issues, engine compatibility, transport problems or restrictions from the destination website.
Why does it show a blank screen?
JavaScript problems, service-worker issues, cached data or incompatibility between the proxy and the destination site.
Why is it so slow?
Proxying adds network and processing steps. Server location and load, transport, the destination and network conditions all affect speed.
Why does one website work and another doesn't?
Sites use different technologies. One that relies on heavy JavaScript, WebSockets, authentication or other browser APIs may behave differently through a proxy.
Does changing browsers or clearing cache help?
Often. Browsers implement web technologies differently, and clearing stale site data helps when old cached files interfere with the proxy.
Why does it work on desktop but not mobile?
Mobile browsers have different APIs, resource limits and compatibility restrictions. Try another mobile browser.
Why don't some games work?
Games can need low latency, persistent connections, WebSockets, large transfers and heavy JavaScript. Not every game works on every deployment.
Is Holy Unblocker down if one website doesn't work?
Not necessarily. If other sites work, the problem may be that destination or its compatibility with the proxy.
Final Thoughts
When Holy Unblocker isn't working, don't assume the whole service is down. Refresh, test another site, try another browser, clear site data and check your connection, then isolate the problem. If every site fails, look at the deployment, browser or network. If one site fails, suspect compatibility or destination-side restrictions. If a site loads but features don't, JavaScript, APIs, WebSockets or cookies may be involved.
Because the project continued as InvisiProxy LTS, current behavior can differ from older Holy Unblocker versions. Keeping your deployment and its dependencies updated matters for compatibility in 2026. See also our disclaimer.