How can this be an unknown file type?

[Krikor]

(06-13-2024, 09:22 PM)ajax Wrote: Just received a very perplexing error message indicated by screenshot that follows:



Just to be sure that message results when trying to export image files of any normal type (i.e., I've tried .tif, .jpg, & .png) as shown by the example that follows:



This is happening when running GIMP Version 2.10.38, which was newly obtained, on Windows.  I definitely need some help figuring out what is going on here.

Perhaps a question regarding the dot (.) in the file menu.
Try replacing the dot (.) with an underscore (_):
IMG_2618.G21038.png by IMG_2618_G21038.png