I could be being silly here, probably in fact, but making sure you know that print doesn’t work (for me at least) from within the Wysiwyg editor. Works fine if I switch to split mode.
Win 10 version 1909
Joplin 1.0.195 (prod, win32)
Client ID: c3759352f83d4713894a8a547eb380d6
Sync Version: 1
Profile Version: 28
Revision: f4a562bc (master)