Power BI Server

Hi — this looks like it might be related to an authentication or connection issue rather than something wrong with your reports themselves.

From the screenshot, the key part is:

“DMTS_OAuthTokenRefreshFailedError” and “Device object was not found in the tenant”

That usually points to one of these:

🔑1. Credentials / Authentication Issue
Go to Power BI Service → Dataset Settings
Check Data source credentials
Try re-authenticating the connection

Sometimes tokens expire or get invalidated, especially with OAuth connections.

🔐2. Gateway / Tenant / Permission Issue

If you're using a gateway:

Check that the gateway is online
Verify the data source is still mapped correctly
Confirm your account still has access to the data source

The “device not found in tenant” message can happen if:

Credentials changed
Account permissions changed
Tenant/device registration issues (especially in enterprise environments)
🔄3. Try a Manual Refresh
Trigger a manual refresh from the Service
Sometimes this helps re-establish the connection and gives a clearer error message
🧠 Quick Question That Might Help Narrow It Down

Did anything recently change in your environment?

Password reset
MFA/security update
Gateway/server changes

That error often shows up right after something like that.

💡Big Picture

Since all reports are affected at once, it’s very likely:
👉a shared connection or authentication issue, not individual report problems

Hope that helps point you in the right direction — let me know what you find 👍

Note: I used AI to help structure my response, but the solution is based on my own experience and has been reviewed for accuracy.