Home made addon – now not showing

Hi. I had an addon that i made and it was working in Kodi 16.1.
I upgraded to version 17. Now my addon does not show.

Is there any extra coding that needs to be in the addon.xml file
Can i just use a zipping app to zip up my files, as i believe now i
can only install from zip and not just put the folder in the addons
folder.

Just checked the log and it says unable to parse the addon.xml file.

thanks for any help.