Hi team, I got a dedicated machine with ubuntu / apache / mysql and correctly set php.ini to 256M max-upload size. Also I increased memory-limit to 1024M and post-max-size to 512M, which should be sufficient to upload an 150M MP4 video-file. Also I increased max_execution_time, max_input_vars and max_input_time to 5000. But I am always running into the error "Unexpected response from the server. The file may have been uploaded successfully. Check in the Media Library or reload the page“, when I try to upload a file bigger than 128M. Wordpress-Version is 5.3.2. I also downgraded to WP 4.9.8 and there the error is simply called "HTTP error." I also did the php.ini global setting in /etc/php/7.2 for upload size in the server-config and I am using only a WAF from Stackpath, which doesn’t limit the upload limit (tested it by redirecting to the original-IP via local hosts-file). Also I use GD-library instead of ImageMagick for image manipulation. As it is an “apache2”-webhost and no nginx, I also haven't got the option with the “client_max_body_size”-parameter. But it MUST be something in the server-setting, because I have already tested and filtered out any other possible culprit (WAF, WP-Version and deactivated all Plugins and switched back to twentytwenty-theme). So I am at the very end of my knowledge. Maybe some of you has an idea how to solve this. Thanks a lot in advance.