Deleting NuGet temp folders fails when running on Linux

[TheCakeIsNaOH]

What You Are Seeing?

In the log (or when running with --debug) when running on Mono on Linux, it shows that choco is failing to remove the NuGet temp directories.

Not able to cleanup NuGet temp folders. Failure was Path to combine cannot be empty. Tried to combine null with ''. Method called from 'delete_directory'

What is Expected?

That the NuGet temp directories can be remove without issue.

How Did You Get This To Happen? (Steps to Reproduce)

1. Build and install choco on Linux
2. Run choco --verbose --debug

Output Log

Full Log Output

choco --debug --verbose
Chocolatey v0.11.2-29-g8fdd1486
Chocolatey is running on Linux v 5.10.0.0
Attempting to delete file "/opt/chocolatey/chocolatey.dll.old".
Attempting to delete file "/opt/chocolatey/choco.exe.old".
Command line: /opt/chocolatey/choco.exe --debug --verbose --allow-unofficial
Received arguments: --debug --verbose --allow-unofficial
RemovePendingPackagesTask is now ready and waiting for PreRunMessage.
Sending message 'PreRunMessage' out if there are subscribers...
[Pending] Removing all pending packages that should not be considered installed...
Sending message 'PostRunMessage' out if there are subscribers...
Not able to cleanup NuGet temp folders. Failure was Path to combine cannot be empty. Tried to combine null with ''. Method called from 'delete_directory'
Exiting with 1

I have a fix for this issue on the way.