我的Firefox155浏览器在Windows11上不能够正常使用浏览器内置的vpn，在之前是可以使用的。而且一旦开启vpn就不能正常打开网站会不停的加载，直到报错。

''My Firefox 155 browser cannot properly use the browser's built-in VPN on Windows 11, but it was still available before. Moreover, once the VPN is enabled, the website cannot open normally and will keep loading until an error appears.'' What is the error? Have you searched this forum for VPN issues ?