how required_field works in the form.

A user of the EMEFS form on the frontend was no longer able to enter an event. The interface refused to propose the location once the first two letters had been entered.
When I checked the form.php template file, I realised that the required_field option was no longer in use. I therefore removed the required_ and left only EMEFS::field.
Once corrected, the ‘location’ field worked fine. But a new error appeared when validating the form, an error indication in red appeared when entering the date. Again, deleting required_ before field solved the problem.
If so, you’ll need to update the documentation, which still mentions the required_ option.

Maybe I do not use correctly the form ?

I have the last version of EMEFS and EME