If you are trying to open up a PDF with our viewer but a blank window keeps popping up repeatedly, then your Google Admin will need to allow third party API access.
- Log into admin.google.com
- Go to Security
- Scroll down and click on "API controls"
- Uncheck "Block all third party API access
- Click "Save"
You can also manually add the IDs. Email email@example.com for the IDs.