Frontend Error after Upgrading to 2.2.5

Question

After much trouble, we have been trying to upgrade our Magento to version 2.2.5 for a plugin we require to function. We have ran the upgrade commands and updated to the latest version, however when you go to the front end you are greeted with this error:

https://pastebin.com/GPsja4cP

We are still able to access the admin panel of magento it is just the frontend website.

Answer 1

Solution: Had to go into my /app/design/frontend/ParentTheme/ChildTheme/ and look for the xml files in the layout folders. There was occurences of the words "Bizkick Above" etc. Replaced these occurrences with "Bizcick_Above" as spaces are not allowed in the references.