1. What happened
When attempting a Linux build on a Windows machine there are a number of errors including:
"InvalidOperationException: Unable to build with the current configuration, please check the Build Settings."

2. How can we reproduce it using the example you attached
Select 'Build Linux (Dedicated Server)' from Build menu
Build fails with various errors including "InvalidOperationException: Unable to build with the current configuration, please check the Build Settings."

User advised build failed after adding a WeakObjectReference baker.

The Linux Server platform in the Build Profiles window has an error stating 'Building Linux IL2CPP player requires a sysroot toolchain package to be installed' but Packet Manager shows both Sysroot Linux x64 and Toolchain Linux x64 as installed. This may be related.