I’ve converted a couple of projects back so it’s 100% possible.
Step 1: edit json file framework
Step2: Replace System.Private.CoreLib
Open all xaml files
Most editors have a replace function, notepad press Ctrl + H, search for: System.Private.CoreLib
replace with: mscorlib
That should take care of 99% of ur errors.
If there still is an issue u may need to remove this line.
mva:VisualBasic.Settings=“{x:Null}”