I'm webmaster of website https://www.biomecanique.org/fr/
i have just updated Acymaling Enterprise to version 8.0.0 (Joomla 4.2.6) - We have a license for it.

I have a strange issue with acymailing but not with usage of acymailing.
We a have community and we used Comunity Builder (CB).
At one moment we need to approve image from CB user and today it is not possible on front but OK in admin.

I have open a ticket into Joomlapolis forum where I wrote all my comments
https://www.joomlapolis.com/forum/146-general/245561-error-500-for-avatar-validation-on-front

Issue is: Not possible to approve a CB avatar image: 2 warning about Acymailing librairies and an error 500

Warning: Undefined array key 0 in /home/etlbertrand/biomecaniquejoomla4bis.en-toutes-lettres.fr/components/com_acym/libraries/override/mail/override.php on line 55
Warning: Trying to access array offset on value of type null in /home/etlbertrand/biomecaniquejoomla4bis.en-toutes-lettres.fr/components/com_acym/libraries/override/mail/override.php on line 55
Error 500: You must provide at least one recipient email address.

I try the same thing on a test site and same issue.
Same issue if I remove the plugin Acymlaing/CB (v 1.2)
But no issue if i completly remove acymailing from my website (done in my test website) it is why i come back to you

Can you help us

Thanks