No Permission for adding App in Teams

I am from the Support team and the app is accessible for everyone in the organisation except one individual and getting permission error, any suggestion here.

We have checked the app permission, and it is allowed for everyone

Welcome, @Manoj_chowdhury,

Sorry to hear this. Your best bet for help:

Try these troubleshooting steps, then please create a support ticket: see How to contact our Support Team.

Thanks,

Larry