v11.2.2: Login impossible and Error Undefined variable: listParam

Hi,
after update from v11.1.5 to current v11.2.2, a single user could not log in.
Instead of getting first page displayed, the browser always remains showing the loading-symbol.
The following error was written to log after every attempt to log in:2024-04-24 11:33:33.497 ***** ERROR ***** [V11.2.2] ERROR *****
2024-04-24 11:33:33.497 ***** ERROR ***** [V11.2.2] on file '/var/www/projeqtor_ym/model/TodayParameter.php' at line (134)
2024-04-24 11:33:33.497 ***** ERROR ***** [V11.2.2] cause = Undefined variable: listParamFirst quick fix to solve the problem (without checking the reason for the above error) is to modify 'model/TodayParameter.php' line 134 in this way:

if (isset($listParam)){
    foreach ($listParam as $param){...}
}

Maybe you have another idea on what went wrong to fix the reason and not the result ... But for the moment it seems to be ok

Best regards,
Torben