Cannot upload files to Google Cloud Storage from embedded app due to CORS error

Error message when trying to upload a CSV file to Google Cloud Storage:

Access to fetch at '<rest of url>' 
from origin '' has been blocked by CORS policy: 
Response to preflight request doesn't pass access control check: 
No 'Access-Control-Allow-Origin' header is present on the requested resource. 
If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

Found the issue, had to add our custom domain to the cors file Connect to Google Cloud Storage | Retool Docs

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Thanks for sharing what solved this so others who might run into the same thing can learn from this post! :bowing_woman: