there is no word services application proxy configured for this site collection

We recently upgraded a SharePoint environment but despite following the guide and configuring Word Automation Services and so on, workflows (or anything trying to use WAS) were failing with the error “there is no word services application proxy configured for this site collection”. All a bit odd because it all looked to be setup correctly.

What we found was that despite being setup, the Word Automation Proxy was not actually connected to the web application...