RC-18 - Opening Compiled DOCX in Word results in "Compatibility Mode"

When compiling document in Vellum Format for Microsoft Word (.docx), Word (Version 2101 Build 13628.20380) complains the file format is outdated and features will not work without upgrading. This is easily accomplished by following the instructions Word presents, but it could be confusing for newer /less familiar users.

I’m running Windows 10 Pro Version 10.0.19042 Build 19042
Processor AMD Ryzen 7 1700X Eight-Core Processor, 3400 Mhz, 8 Core(s), 16 Logical Processor(s)
Installed Physical Memory (RAM) 32.0 GB