Hence, the administrator has blocked the ports or web applications, which is why you are getting this error. The easiest and simplest way to fix this error is to contact the administrator to gain access to using web applications. If it is not possible for any reason, then follow the methods to fix this error.
1. Configure the Registry Editor.
You or your administrator may have configured some policies that prevent you from accessing websites on your browser. Hence, try configuring the registry entries properly using the following steps:
1.1 Chrome
1.2 Microsoft Edge
2. Change the Browser
If you still cannot access the sites due to the ERR_BLOCKED_BY_ADMINISTRATOR message, we recommend either reinstalling your browser or trying a different one. If the administrator has set policies for only the installed browser, changing browsers should allow you to access the websites and fix this error. There are many different browsers available; you can install any of them using the built-in browser, which is Microsoft Edge. We recommend that you visit the article on the Top 7 Best Browsers of All Time to select the best one.
