The direct ticket links still don't work for me in ProjeQtOr 9.0.5, even tough Ticket #5277 is marked as "delivered" in the ProjeQtOr Roadmap.
The screen which opens whenever I use a direct link looks as follows:

There don't seem to be any errors in the logs any more, however it still only shows an empty page, neither in the server log nor in the Javascript console.
The Javascript console only issues some warnings:
dojo.js?version=V9.0.5.0280:2 [Deprecation] Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/. 5 [Violation] Added non-passive event listener to a scroll-blocking event. Consider marking event handler as 'passive' to make the page more responsive. See main.php?directAcces…t&objectId=116:1130 [Violation] Added non-passive event listener to a scroll-blocking 'wheel' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952 main.php?directAcces…t&objectId=116:1195 [Violation] Added non-passive event listener to a scroll-blocking 'wheel' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952 main.php?directAcces…t&objectId=116:1208 [Violation] Added non-passive event listener to a scroll-blocking 'wheel' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952 main.php?directAcces…t&objectId=116:1221 [Violation] Added non-passive event listener to a scroll-blocking 'wheel' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952 main.php?directAcces…t&objectId=116:1234 [Violation] Added non-passive event listener to a scroll-blocking 'wheel' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952 dojo.js?version=V9.0.5.0280:2 [Violation] 'DOMContentLoaded' handler took 812ms [Violation] Forced reflow while executing JavaScript took 75ms projeqtor.js?version=V9.0.5.0280:180 => 65ms | page='../view/menuNotificationRead.php' | destination='drawNotificationUnread' (server:60ms, client:5ms)
Which browser are you using ?
Chromium Version 87.0.4280.66 (Offizieller Build)
Built on Ubuntu , running on neon 20.04 (64-Bit)
If you replace line 584 in file view/main.php
echo 'var delay=(dojo.isFF)?1000:10;';
with
echo 'var delay=1000;';
Does it fix the issue (after reconnextion) ?
Yes, this seems to help.
OK, we'll generalize it.
