Error message in Algolia Search > Indexing Queue - no idea what it means!

Fatal error : Call to a member function setColumn() on boolean in /home/emmettan/public_html/app/code/core/Mage/Adminhtml/Block/Widget/Grid/Column.php on line 291

It appears my Algolia search functionality stopped about a month ago. Is this what’s preventing it working? Any ideas how a non technical person can solve it?!