Error Message - non latin characters when saving animated gif

While creating a frame animation and saving for web - (cmd+alt+shft+s) - I am confronted with an error message: "some names of the files being saved contain non latin character.  These file names will incompatible with some web browsersand servers."

This occurs no matter the layer names, placed, rasterized, or linked images, as well as ps generated artwork.   I have created  multiple docs in different ways, and renmaed files at save, post save and used default PS untitled naming -  and the no matter - the error persists.

All layers have been systematically renamed, deleted, remade, etc etc.  this is new message to me after using animated gifs for over 15yers - and seems to fll in line with upgrade to CC 2021.  Prefs have been reset, Ps restaretd etc.  Please help as I need to be able to get gifs out of photoshop post haste!

OSX PS 2021