The error message "App role with identifier must have at least one value specified for 'allowedMemberTypes'" means that when using Graph API v5 to patch App Roles on an App Registration, you must specify at least one allowed member type for the app role. The allowed member types define the type of members that are allowed to be assigned to the app role, such as users, groups or service principals. Therefore, you need to ensure that you have specified at least one allowed member type for each app role in the App Registration that you are patching.
