Hey, Will the plugin be made compatible with this?

It's compatible since months.
You can get it here
https://ci.dsh105.com/job/EchoPet-v2/changes

Well I still get this error whenever I use it http://pastebin.com/BRcqeeKG

Can you list your plugins?
Any other plugins that are manipulating entities?

Not sure but #559 and #564 seem to be having the same problems.