Known issue - Edit tables dialog doesn't load when reloading a Direct Lake semantic model
You can edit a semantic model in Direct Lake mode built on a data warehouse. If you select Edit tables to add or remove tables and then select Confirm with or without making selection changes, the semantic model performs a schema refresh. You can also select the Reload button to the right of the search box to refresh the schema. You might experience an issue where the Edit tables screen hangs and the tables don't load again after selecting the Reload button.
Status: Open
Product Experience: Power BI
Symptoms
You see a Fetching schema spin indefinitely after opening or selecting the reload button in Edit tables dialog.
Solutions and workarounds
You can go to the data warehouse or SQL analytics endpoint to refresh the table schema. Alternatively, you can wait a minute for the automatic refresh to happen before opening the Edit tables dialog.