First startup of Projeqtor blocked

Hello, 
I would like your help to start Projeqtor.
After configuration and connection with "admin". the startup process is blocked as shown in the image below. I have left it running for more than 6 hours. 
Thank you

Nourouddini

2022-05-09 12:36:35.175 ===== TRACE ===== NEW CONNECTED USER 'admin'
2022-05-09 12:36:48.757 ***** ERROR ***** [V9.5.3] ERROR *****
2022-05-09 12:36:48.762 ***** ERROR ***** [V9.5.3] on file 'C:\xampp\htdocs\projeqtor\view\menuUserTop.php' at line (130)
2022-05-09 12:36:48.763 ***** ERROR ***** [V9.5.3] cause = ucfirst(): Passing null to parameter #1 ($string) of type string is deprecated

Hello,

I disagree with you @Babynus: the page "technical prerequisites" clearly states that Projeqtor v9.5+ supports PHP8.1.
URL: <www.projeqtor.org/fr/product-fr/technica...uct-prerequisites-fr>

But indeed, I had the same problem when I deployed Projeqtor on PHP 8.1...

I add a screenshot of the prerequisites page.