Has anyone else experienced this Invalid Credentials pop-up when trying to update a data source in Tableau Desktop?

When I click to edit a data source, I get this pop-up:

I then click on Connect, and the pop-up disappears, but otherwise nothing else happens. 

So I try again and click on Edit Data Source Credentials, which brings me to this screen:

Then I click on the "Sign In" button and get this error message:

I am logged into Snowflake and Tableau Cloud this whole time. I have tried clearing saved server sign-ins via Help>Settings and Performance in Desktop, and then restarting, but I get the same error. I have tried removing and re-adding the Snowflake saved credentials on Tableau Cloud, but that doesn't fix anything. 

I can use the same Snowflake credentials to create a new data source in the same Tableau Desktop workbook, and even go back in and edit that new data source, but I can't edit any data sources from before without getting this pop-up. I can also edit those same data sources on Tableau Cloud without issue, but not in Desktop. 

Not sure what to do here. Any ideas?