Well I found the issue on our end.
We were extending the users-permissions plugin and there is a small change in the /config/functions/bootstrap.js file, which we needed to copy from the original file, as the permissions have been reworked (I18n/ permissions rework by Convly · Pull Request #9535 · strapi/strapi · GitHub).
- const { actionProvider } = strapi.admin.services.permission
- actionProvider.register(usersPermissionsActions.actions)
+ await strapi.admin.services.permission.actionProvider.registerMany(usersPermissionsActions.acti
ons)
I hope this helps a little.