After upgrading PHP to Version 7.4 on a Ubuntu Xenial server running Apache2, I am facing a problem with the web Interface:
When I click on the ‘File’ (Dateien) Button on top, the file list appears, but on top of the list there is a rotating ‘busy’ indicator (see image). After a few minutes an error message appears. The page is not responding any more.
Everything else seems to be working, both on the web and with clients. The log show mostly ‘/appinfo/app.php is deprecated’ messages.
Can anybody give me hint what could be the problem? Any help is highly appreciated.