MP unfortunately bugs out like this for many people at times. What I do is uninstall and reinstall and it works as it's supposed to, but with many accounts and a lot of manual settings that's easier said than done. Very rarely will you get real support from the MP people except for the usual "your fault".
It is not showing error but it says "Unlike posts executing"
Ahhh... they snuck that in the most recent update!
Go to tools -> Like -> Settings & look towards the bottom. There's a new setting "Keep a maximum of xxx likes". I think by default it's set to 500. Change that to 0 to disable. It's probably not liking anything because it's running through the unlike routine. I'm not sure why they added that?