LogDerivedDataCache:Warning: Shared data cache path was not usable, will not use it

Development Modding
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1

What are the potential causes of this error?

2

Turns out this was a network access issue. Had to setup a net use with /USER parameters that had access to the drive in the batch file.
Then modify UE-SharedDataCachePath to point to the temporary drive.
Hope that helps someone else.