Hi, I'm able to load a modlet using without issue using the below code in the modinfo.xml. Try this format. If that doesn't resolve it, I noticed you have multiple mods installed so I'd try eliminating each one as a potential cause. However that line is non-functional in A21 and can be safely commented out without issue as a worst case.
<?xml version="1.0" encoding="UTF-8" ?>
<xml>
<Name value="Xpath_Test"/>
<DisplayName value="Dracconis69's-Advanced-HUD" />
<Version value="1.0" />
<Description value="Xpath Test"/>
<Author value="Xpath Test"/>
<Website value="www.7daystodie.com" />
</xml>