Internal ERROR BigQuery connection.

[Nikolai_C]

I am trying to create a BigQuery connection to load the tables from my CSV, which I also retrieve from a GCP bucket. However, when I try to create a connection with BigQuery and log in using "Sign in with Google," I get an "Internal Error" with no additional details.

When I try using "Sign in with Google—private," I use my Client ID and Client Secret (extracted from IAM / Service Accounts / Keys) and get a "400 Error: redirect_uri_mismatch."
i'm using the latest version of Alteryx Designer 

[CailinS]

@Nikolai_C I found the Help file mentions an issue with special characters: https://help.alteryx.com/current/en/designer/data-sources/google-bigquery.html#standard-workflow-pro... check that out and see if it solves your error. If not, I suggest logging into my.alteryx.com and opening a Customer Support Case. Be sure to mention what version of Alteryx Designer you're running if you go through route.