User keeps getting upgrade-question although user has Pro-license in O365 admin

We have a user that hasn't logged in for many months due to health-problems, and now she is back and tries to open an already existing PowerBI report. She is logged in via our company account, we checked and in O365 admin she is registered as a PowerBI Pro user. When she logs in to powerBI with that company account, she can see all the reports and dashboards she had before, but when she tries to open a report, it constantly is telling her to Upgrade her account to a Pro account. We even removed her Pro-license and re-added it, it doesn't change anything, it keeps asking for an upgrade. I used multiple browsers, and I even cleared the complete cache from Chrome browser, restarted the browser and still, it keeps saying she need a Pro account. There is a user sitting next to her who can start the same reports as she would like to start, so it is solely to her that it doesn't works. Any idea as I am completely out of resources on why it seems that her pro account is not active. regards, Norman Veger