I keep getting this error when I upload to google

Errors:
Error Bad data Line # 22150
We didn't understand some of the XML formatting in your file. You may be missing a tag or have a nesting or formatting error.

line 22150 looks like this - <g:mpn>ChameleonEvoGore-Tex&reg;XCR&reg;</g:mpn>

I've been searching the forum, and I think it has to do with the sanitizer function not working right, but I have no clue how to fix it
what am I missing?