Hi,

Using 
- MAMS 1.1.0
- CMSMSExt 1.5.0

Trying to go the the MAMS backoffice users admin:

PHP Fatal error:  Uncaught MAMS\\MethodNoFoundException: method get_action_name
not found in  MAMSManipulator object in /www/modules/MAMS/MAMS.module.php:893
Stack trace:
#0 /www/modules/CMSMSExt/lib/module/class.backend_css_manager.php(67):
MAMS->__call()
#1 /www/modules/CMSMSExt/lib/module/trait.CMSModuleMethods.php(317):
CMSMSExt\\module\\backend_css_manager->get_tags()
#2 /www/admin/moduleinterface.php(79): CMSMSExt\\XTModule->GetHeaderHTML()
#3 {main}
  thrown in /www/modules/MAMS/MAMS.module.php on line 893

The MAMS __call method tries to find the get_action_name() method used in the
new file from CMSMSExt : class.backend_css_manager.
But it doesn't exist in the MAMS user manipulator

Its working fine with MAMS 1.1.0 and CMSMSExt 1.4.5

Thanks