Hello guliteb,
Thank you for reaching out to Microsoft Support!
According to your question, we did the same test, the test results are as follows, the operation is very good:
For your problem, please do the following check:
The user you log in to in Graph Explorer needs to be a work or school account, and the account needs to have the appropriate role, and make sure that the role is active and valid, as shown below:
Reference document:
Hope this helps.
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