Glossary CSV import prevents published product from opening

I imported a glossary as a CSV file into a Storyline 360 project, published it to Review 360 and it refused to open.  I tested the project file prior to publishing by previewing the first slide, it refused to open, neither would any other slide when previewed.  I opened a separate project which did not have the CSV file imported and it both previewed and published correctly.  I then imported the CSV file into it, previewed and published and it refused to open.

I then deleted all but one of the glossary entries, republished to 360 Review and the project opened.  I reimported the glossary CSV file published again to Review 360 and it refused to open. I then deleted all the glossary entries and republished the file to 360 Review and the project opened normally. 

I then reimported the CSV file, and then exported it. I deleted the glossary, saved and closed the project, reopened it and imported the CSV file I had exported previously.  After publishing, the project refused to open.

So, could there be a glossary size limit that is preventing my project opening?