Merge system uploaded then showing error

I changed my host so I changed the php version to 7.2 then installed mybb.
Then, I uploaded the merge system. 

Now when I am running the merge say xyz.com/merge

I am seeing these warnings. I don't understand I have done it many times before but haven't faced this.

Here are the screenshots. https://ibb.co/xs9wXsy https://ibb.co/Ky62S4c

This is my live site. So, I am concerned. Please help. Should I continue?