Cannot eport to EPUB from master document

Attempting export to EPUB Results in the following error dialogue:

Error saving the document DocumentName:
Wrong Parameter.
The operation was started under an invalid parameter.

All associated files are in the same directory. Each of the linked section documents that are inserted into the master document export as individual EPUBs with no issues or errors. Only the master document fails to export. I am using the Ubuntu version of LibreOffice on Pop_OS.