Hello,
Which version are you using?
Errors in the JS console?
I cannot reproduce your case in the latest stable version.
Hi,
1. Version I am using is: 12.3.2.
2. Error in the JS console: Please refer the attached image.
Also find the below log recorded in ProjeQtOr:2025-10-23 11:45:49.509 ** ERROR ** [V12.3.2] [27] ERROR **
2025-10-23 11:45:49.511 ** ERROR ** [V12.3.2] [27] on file 'C:Apache24htdocsprojeqtortooljsonFunctions.php' at line (321)
2025-10-23 11:45:49.523 ** ERROR ** [V12.3.2] [27] cause = preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated
2025-10-23 11:46:44.886 ** ERROR ** [V12.3.2] [27] ERROR **
2025-10-23 11:46:44.889 ** ERROR ** [V12.3.2] [27] on file 'C:Apache24htdocsprojeqtortooljsonFunctions.php' at line (321)
2025-10-23 11:46:44.890 ** ERROR ** [V12.3.2] [27] cause = preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated
Hello,
Thank you for this additional information. Unfortunately, I am unable to reproduce the issue, but I'm going to record the ticket. #10704
The PHP error has been corrected and does not cause the problem you are experiencing with the operator.
Have a nice day,

