Users cannot open Planner tasks out of Teams any more

The inconvenience is that nobody can do their work as usual.

As already four people have the same question I assume that it's not something that only happens on our tenant.

Please investigate further to resolve this problem!

I guess it's related to this problem that we are experiencing as well: https://answers.microsoft.com/en-us/msteams/forum/all/tasks-not-opening/1c881535-bb29-4de8-ba8b-64a73207b26b

Hello, SadDaniel! My name is John, and I am an Independent Advisor as well as a long-time Microsoft user. I am glad to help regarding your Teams issue.

I also hope you are doing great aside from your concern today.

With regard to your problem, it is highly recommended that you try the following suggestions and check whether it works for you:

1. Clear Teams cache by following the steps below:

a. Fully exit the Microsoft Teams desktop client.

b. Go to File Explorer, and type in %appdata%\Microsoft\teams.

c. Once in the directory, you’ll see a few of the following folders:

   From ‘Application Cache’, go to Cache and delete any of the files in the Cache location. “%appdata%\Microsoft\teams\Application cache\Cache”. 



   From ‘Blob\_storage’, delete any files that are located in here if any. “%appdata%\Microsoft\teams\blob\_storage”. 



   Within ‘Cache’, delete all files in “%appdata%\Microsoft\teams\Cache”. 



   Within ‘databases’, delete all files in “%appdata%\Microsoft\teams\databases”. 



   Within ‘GPUCache’, delete all files in “%appdata%\Microsoft\teams\GPUcache”. 



   Within ‘IndexedDB’, delete the .db file in “%appdata%\Microsoft\teams\IndexedDB”. 



   Within ‘Local Storage’, delete all files in “%appdata%\Microsoft\teams\Local Storage”. 



   Lastly, from ‘tmp’, delete all files in “%appdata%\Microsoft\teams\tmp”. 

d. Restart Team.

2. You can try re-installing Teams to check the result. Since the data are all stored online, don't worry about the data loss.

If it's the same issue, please provide the error message and Teams version so that I can better understand your problem and further assist you.

Seems like this issue has just fixed itself (or someone at Microsoft finally found some bug and fixed it silently): https://answers.microsoft.com/en-us/msteams/forum/all/tasks-not-opening/1c881535-bb29-4de8-ba8b-64a73207b26b

What about our issue? When will the system repair itself in this regard?

Now it's 6 people that have the same question. I still doubt that it has something to do with our tenant.

Dear SadDaniel,

Good days, thanks for querying in this forum. We’re happy to help you.

From your description, it seems that most of your users cannot access the Planner task in Microsoft Teams, and it works fine in Planner for web.

If my understanding is right, we have also tested it on our side, and we can access the Planner task in Teams without any problem.

Given this situation, we do understand the inconvenience caused and apologize for it. Since we cannot reproduce the same situation as yours and most of your users have the same problem, this issue may be related to your team or tenant and may need to checked from background. The best way to troubleshoot the issue is to report the issue to the related Team. We’d suggest you contact your office 365 administrator to go to Office 365 Admin Center-> Support-> New Service Request, the support engineers there have the correct escalation channel and this is the most efficient way to report such issue. You can refer to this article to check the way how to raise a ticket. Ways to contact support for business products - Admin help. The engineers in related team have higher permission and resources than us to help collect log and check the root cause directly.

Your understanding and patience will be highly appreciated. I hope that you are keeping safe and well!

Sincerely,

Sukie | Microsoft Community Moderator