Hi @EStoelinga ,
I am not authorized to access the organization.
Did you tried to clear the browser cache using ctrl+shift+R. It might be the browser cache issue .
Also, you can try to create a new incognito window and sign in to your organization https://dev.azure.com/QbuzzAnalytics/ with the invited account in this incognito window.
This is because when the user clicked the email invitation, this will automatically jump to the browser to use the default account cached by the browser to log in to the organization, and this default account could not be the invited account.
Refer Troubleshoot document to access the organization .
Thanks,
Shweta