When downgrading your pricing plan to the PROFESSIONAL plan, a situation has occurred where you actively use the Visibility tree feature in Raynet.
This problem can be solved by disabling the Visibility Tree. By disabling this feature, you will not lose the currently set permissions. However, you will no longer be able to set these permissions using the Visibility Tree.
The Visibility tree can be disabled by a CRM account administrator. Click on your name » Settings » Security » Visibility tree. Here you need to click on the trashcan icon that appears after hovering over the Visibility tree heading. Then click on the Deactivate button.