Welcome to the forum!
Hhmm, that is not good news..... When you installed Inkscape, did you let it install where it wanted to, or did you change the location? Do you remember whether you asked Inkscape to keep your old preferences file? I seem to recall there's an option not to keep it.
Would you browse to the location in that error message? By the wording of that message, it sounds like Inkscape found your prefs file, but couldn't read it. I would hope that Inkscape kept the old file (by re-naming it) rather than overwriting it. Do you see 2 prefs files? Or just one?
If there's just one prefs file there, I'm trying to think of some way to find out if it's the default prefs file. I guess it would be....
This is very strange, and I've never heard of it before! My best guess, from experience with Inkscape, and providing support, that error message means something else, and is just worded badly. But we should try and chase it down anyway. We might have to bump this up to developers, if we humble users can't sort it out.
By chance, do you still have your previous version installed?
Can you tell us specifically which file you installed? Help menu > About Inkscape, and copy the version number and all the numbers to the right. Or if you have the link to the file you downloaded, that would be fine too.
Just to confirm this, you were able to import images from this same folder (which produced the 2nd error message) using your older version of Inkscape. Right?
I haven't installed 0.92.4 yet, but after I find out exactly which package, and which settings you used, I'll install using your info, and try to reproduce these errors. Although, I'm on Windows 7, so it won't be exactly the same conditions.