-Refreshing the data model works fine in the power bi desktop (which is also installed on the same server at the on-premise gateway)
-Publishing the PBIX works fine but then refreshing data just results in the loading icon of doom on the dataset for 20mins then a warning sign but no specific error even in the refresh history logs.
-I managed to find this in the gateway log "System.InvalidCastException: Unable to cast GuidColumn to type String" I can't seem to find anything else regerding the issue since error reporting is basically non-existent.
-Re-installed both Desktop and Gateway to latest version.
-I am pulling tables from one SQL server for the dataset and I have tried creating a new dataset with different tables which uploads and refreshed fine.
-I wish there were more detailed error logging so I could track this down but even the verbose logging is terrible.