I tried this on my HTC desire 816 Indian version and just like you stated my phone started behaving weirdly
internet is not working and all those random process errors.
after that i messed up my phone even more and now i cant get pass the htc logo... seems like i soft bricked my phone.
So i need your help bro in flashing my phone from this TWRP backup.( that Jithu prepared)
Im still new to all this and Im looking for a proper step by step tutorial . Help would be really appreciated.