Cannot create or edit EPUB files

[deananorth]

I am unable to create or edit EPUB files. I get the following error popup:

[Exception... "Component returned failure code: 0x80520001 (NS_ERROR_FILE_UNRECOGNIZED_PATH) [nsIFile.append]" nsresult: "0x80520001 (NS_ERROR_FILE_UNRECOGNIZED_PATH)" location: "JS frame :: chrome://bluegriffon/content/utils/global.js :: appendPath :: line 447" data: no]

Additional Information:
Operating system: Windows 10 Home build 19042.685 with Windows Feature Experience Pack 120.2212.551.0
RAM: 16GB
Processor: AMD Ryzen 5 3600 at 3.6GHz

Updates: I was able to edit an EPUB file created by Sigil