Issue
When landing on the run page to select the DocGen Package, the screen is appearing as blank. This is prior to running the package.
Resolution
Navigate to Setup > Rename Tabs and Labels > Custom Tabs > Check the "DocGen Packages" label. Make sure there are not apostrophe as this will cause the run page to display as a blank page (ex: DDP's)
Additional Information
If the instructions above does not resolve your issue, please contact the support team.