I am stuck at this point when I click on the Refresh button. Looks like there is a problem in September 2021 update, I've downgraded to August and it's working fine.
Came here to say the same thing.
Only shows "Creating connection in model..." and does not show the number of rows deployed.
Datasets that have been running perfectly fine for well over a year have now ground to a halt.
My colleagues have also noted a remarkable drop in performance with their datasets.
Version: 2.97.861.0 64-bit (September 2021)
Edit: Spelling + Added detail.