Are you talking about this — https://i.imgur.com/mji86TP.jpg ?
I went ahead and create a new website, installed both plugins, and clicking multiple public pages as well as pages inside the admin dashboard. I switched among 3 different user accounts and was unable to reproduce the error.
I searched the message “Sorry, you are not allowed to access this page” on the entire source code and could only find references to it in WordPress core files (see the list below) which means the message is not rendered by any of these plugins, but one of them may be triggering it somehow.
wp-admin/network/sites.php
(line 14)
wp-admin/network/sites.php
(line 126)
wp-admin/network/settings.php
(line 17)
wp-admin/network/index.php
(line 17)
wp-admin/network/upgrade.php
(line 36)
wp-admin/network/users.php
(line 14)
wp-admin/network/users.php
(line 23)
wp-admin/network/users.php
(line 44)
wp-admin/network/users.php
(line 57)
wp-admin/network/users.php
(line 117)
wp-admin/network/site-settings.php
(line 30)
wp-admin/network/user-new.php
(line 34)
wp-admin/network/site-info.php
(line 32)
wp-admin/network/site-themes.php
(line 53)
wp-admin/network/site-users.php
(line 46)
wp-admin/includes/menu.php
(line 342)
wp-admin/my-sites.php
(line 16)
Please provide a step-by-step of how to reproduce this error.