Printing Error: Adobe Print Engine Failure

I'm having some trouble with a print error (The Adobe Print Engine has failed to output your data due to an unknown problem). I've trouble-shooted with some articles on here and gone through the steps in this post: https://helpx.adobe.com/indesign/kb/error-print-engine-failed-print.html

I was able to print the document through the workaround of exporting to a PDF, but want to know the reason why it was getting that error. I've run into this issue with a few files before, but had no luck figuring out the reasoning. Usually, the files that have the error have been originally set up by someone else or are a copy of a file. 

In addition to the suggestions in the post linked above, I've tried trouble-shooting by isolating out layers/objects, etc. and re-sending to print to try to find the direct issue. No luck with this either. 

Any suggestions? I've seen articles going back years with this same issue, but no clear reasoning for why.

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