Excel Power Query integration with Salesforce: The Service Returned an invalid token
Solution 1:
The troubleshooting section in this document might be relevant:
https://docs.microsoft.com/en-us/power-query/connectors/salesforceobjects#troubleshooting
In summary:
- install Edge Chromium
- in System Environment Variables set PQ_ExtendEdgeChromiumOAuthAllowList to Salesforce