Hi All. Had the same problem but solved.
(Backup files before editing)
For error:
1)
Warning: Invalid argument supplied for foreach() in /…/wp-content/plugins/advanced-access-manager/Application/Backend/Manager.php on line 87
Solution:
In line 87 change
“foreach($list as $extension)” to “foreach((array)$list as $extension)”
2)
Warning: Invalid argument supplied for foreach() in /…/wp-content/plugins/advanced-access-manager/Application/Core/Repository.php on line 224
Solution:
In line 224 change
“foreach ($list as $row)” to “foreach ((array)$list as $row)”
3)
Warning: Invalid argument supplied for foreach() in /…/wp-content/plugins/advanced-access-manager/Application/Backend/Extension.php on line 180
Solution:
In line 180 change
“foreach($list as $extension)” to “foreach((array)$list as $extension)”
That works for me.
Regards