Problem with the backside user management

Enable Joomla debug mode and retry the same steps. This will let me know the actual line number the error. Looks like an error in CB Conditional, but am not setting any problems with CB Conditional in my tests.

here the details
If its help

Herre the result. Where should I see the result of the debug after having activated it ?

here are the screen

Looks like you've a REGEXP condition on a tab or field, but didn't provide valid REGEXP. Please check any conditioned tabs or fields you have and review your REGEXP conditions to ensure you're providing valid REGEXP. Have added a bug ticket to see if CB Conditional can more elegantly detect this to avoid it breaking JS.

forge.joomlapolis.com/issues/8352

Many thanks for your help. I'am checking all of them

Do you have a memo on the correct spelling for regex expression :

I have doubts about using ( is regex ) for a field written like : SPORT / ORDONNANCE

Other doubts come from a field REGEX : [1|2] don't know if [ anbd ] are troubling

Have you a spécific link to check