Hi, I need your help. Installation info: ISPconfig version 3.2.2 on a Debian 10 stable, Apache 2.4, PHP-FPM, php7.4. Recently added http/2 to the server through a2enmod http2, a2enmod mpm_envt, a2dismod mpm_prefork, a2dismod mpm_prefork. According to logs and browser the pages are also delivered with http/2. Now I have the following problem with a wordpress page. The page hangs regularly when clicking through and does not load for about 5 minutes. Also a new call in the same browser does not work. Only after about 4.5 to 5 minutes the last clicked page / pages in the same browser will be delivered. (The process can be accelerated manually by restarting Apache. The server then also delivers the last page request automatically after the restart) At the same time, however, the page can be opened in a second browser until it hangs again / server no longer delivers data. Server load like CPU and ram are OK. When I disable http2 on the server the error does not occur and the page is consistently delivered from the server. The page currently loads a bit faster with http1.1 than with http/2. In Microsoft Edge I get partly the following error message: ERR_HTTP2_PROTOCOL_ERROR In Firefox, ns-binding-aborted is displayed in the network analysis in the webmaster tools for approx. 4 to 5 minutes when the server does not deliver any more data to the browser. Unfortunately, I have not found a solution on the internet. Do you have an idea? Thanks already for your help.