You no longer have access to Planner

I had a fun one recently, I was looking through the different things I could do to a Planner (Microsoft Tasks) and accidentally Left the plan. This resulted in me being kicked from the Team (one where I was the owner) and with me, came the files... All the files started to be deleted one by one, they went to the recycle bin so they were easy enough to be restored, but weird anyway.

So, you accidentally left a Plan and now that you're part of the Team again, you get the following message


Going through planner online gives you the option to request to join the Plan, but those requests go no where.
No one that is currently part of the plan can add you, and once leaving and rejoining the plan, it says you're part of the plan, even though you can access.

How I fixed it:

Go to the Sharepoint of the Team.
Go to Conversations, this will open the Outlook Web App for the Team.
Click the 3 dots and go to Planner


For me, this opened up Planner web and restored my access.
I was also able to access the Planner tab in the Team.