Inadequate Permissions reported when publishing to /bin/staticsites/ss-oryx/app

My build script, that hasn't changed in the last 6 months, has started throwing an error "Inadequate Permissions. Run the command with elevated privileges" when writing to /bin/staticsites/ss-oryx/app

A clear and concise description of what the bug is.

**To Reproduce**
Steps to reproduce the behavior:
1. Configure a package.json script with a 'build' script containing the command `dotnet publish -c Release -o /bin/staticsites/ss-oryx/app`

**Expected behavior**
No errors, content is written to the output folder and application is deployed