Describe the bug
The bug (error message) came when I was invited to a community and I could not accept this invitation.

Information (you can find these in [WindTools-Information]):

• Addon Version: 2.18 Windtool
• ElvUI Version 12.24
• WoW Build Version 9.05.(38556)

Additional context
Here is the error code I got. When I deactivated Windtool, I was only able to accept the invitation.

1x [ADDON_ACTION_FORBIDDEN] AddOn 'ElvUI_WindTools' hat versucht die geschützte Funktion 'AcceptInvitation()' aufzurufen.
[string "@!BugGrabber\BugGrabber.lua"]:519: in function <!BugGrabber\BugGrabber.lua:519>
[string "=[C]"]: in function AcceptInvitation' [string "@Blizzard_Communities\CommunitiesInvitationFrame.lua"]:89: in function AcceptInvitation'
[string ":OnClick"]:2: in function <[string ":OnClick"]:1>

You might be right about that. Later I looked again at the Bug Sack (addon). I received 2 error messages. These from Windtool and MoveAnything.
It could of course also be that MoveAnything is causing the error.

1x [ADDON_ACTION_FORBIDDEN] AddOn 'MoveAnything' hat versucht die geschützte Funktion 'AcceptInvitation()' aufzurufen.
[string "@!BugGrabber\BugGrabber.lua"]:519: in function <!BugGrabber\BugGrabber.lua:519>
[string "=[C]"]: in function AcceptInvitation' [string "@Blizzard_Communities\CommunitiesInvitationFrame.lua"]:89: in function AcceptInvitation'
[string ":OnClick"]:2: in function <[string ":OnClick"]:1>

Stop all modules/addons that making frames movable may helped.
Some protected Blizzard functions are easily getting error if you moved some frames.

Did you test with only ElvUI_WindTools & ElvUI enabled?
To my experience, ADDON_ACTION_FORBIDDEN usually occurred by other addons.

Reopen this issue if you confirmed this problem caused by WindTools.