First, sorry for my english. I'm french speaker. I do my best

I have installed :
CMSMS version 2.2.12
Formbuilder 1.0.1
Mail setting : SMTP (test OK)
In the admin Formbuilder : I can't edit or create a form fields (in the basic contact form and the other).
When I want edit or create a form fields , I receive a blank page (copy of the url's blank page :
https://onoze.be/admin/moduleinterface.php?mact=FormBuilder,m1_,admin_add_edit_field,0&__c=cd8e203ee19cc2b6852&m1_form_id=2&m1_fbrp_order_by=9)
Here is the error log Apache :
AH01071: Got error 'PHP message: PHP Fatal error: Uncaught CmsError404Exception: Module action not found in /var/www/vhosts/onoze.be/httpdocs/lib/classes/class.CMSModule.php:1395\nStack trace:\n#0 /var/www/vhosts/onoze.be/httpdocs/modules/FormBuilder/FormBuilder.module.php(193): CMSModule->DoAction('admin_add_edit_...', 'm1_', Array, '')\n#1 /var/www/vhosts/onoze.be/httpdocs/lib/classes/class.CMSModule.php(1479): FormBuilder->DoAction('admin_add_edit_...', 'm1_', Array, '')\n#2 /var/www/vhosts/onoze.be/httpdocs/admin/moduleinterface.php(74): CMSModule->DoActionBase('admin_add_edit_...', 'm1_', Array, '', Object(Smarty_CMS))\n#3 {main}\n thrown in /var/www/vhosts/onoze.be/httpdocs/lib/classes/class.CMSModule.php on line 1395', referer: https://onoze.be/
All my site CMSMS and other modules run...
Have you some idea to resolve that ?
Thank you !