Just upgraded to the latest version of Moodle 3.10.6 (Build: 20210729).
Also upgraded to the latest Mootyper v4.0.1. Also trying out the latest
Skype v3.8.0. Still lots of checking to do on this as I dropped back to
v2.7 to get a working oops.html, then worked forward. The oops has
become oops.php in the main skype folder with bg.png file moved to the
pix folder. The old folder, skype_not_found, has bee eliminated.