I think this issue is fixed on V9.0.3.
If not, please post error message logged in log file
I'm already on v9.0.3
Tested with Chrome, and Firefox
Here is the log
2021-02-03 22:25:00.457 ===== TRACE ===== Cannot check Version at http://projeqtor.org/admin/getVersion.php
2021-02-03 22:25:00.457 ===== TRACE ===== Maybe allow_url_fopen is Off in php.ini...
2021-02-03 22:25:05.836 ** ERROR ** [V9.0.3] ERROR **
2021-02-03 22:25:05.838 ** ERROR ** [V9.0.3] on file '/var/www/html/projeqtor/view/menuNewGuiLeft.php' at line (365)
2021-02-03 22:25:05.838 ** ERROR ***** [V9.0.3] cause = file_get_contents( http://projeqtor.org/admin/getPlugins.php): failed to open stream: Network is unreachable
This error occurs all the time, on new and old IHM
On new GUI, yes, but on old one, no, only traces should appear.
To avoid this, on global parameter set "check verison" to NO
