After the upgrade to MediaWiki 1.35 we run into annoying errors on some (Special-)Pages with Edge, Chrome and Internet Explorer.
Blank page, nothing worked, not one byte was loaded. The console in the webdeveloper window shows error net::ERR_HTTP2_PROTOCOL_ERROR 200
First thought was, that we had issues with the SSL certificate. But it wasn't.
Then we found https://phabricator.wikimedia.org/T235554
$wgDisableOutputCompression = true;
in the LocalSettings solved the problem.
It solved the problem for us too, but only on 1.35.0, after that per the phab task there is not a resolution as of yet for folks that encountered this issue previously. Setting $wgDisableOutputCompression = true; in 1.35.1 only resulted in random characters being displayed for Chrome and iOS Safari (on our setup). For us the 1.35.0 problem happened on FF, Chrome and iOS Safari (Edge always being fine, edge still being fine on 1.35.1, where FF is now also fine on 1.35.1, but Chrome and iOS were messed up, strangely got Chrome working by accident by toggling on and off random caching options... then putting it back to exactly how I had it before!--inexplicable, and iOS Safari still broken with "cannot parse response" error). --We're using Dreamhost VPS. Trying to decide if we should move our prod site to 1.35.0 with $wgDisableOutputCompression = true; so we can have VE, or if other issues might emerge... for now staying on our current version.