Indexing stays stuck on 99%

This is with Logos 7.2 beta 4 on Windows 10

I've just acquired the Verbum free book for November ("An Essay on the Development of Christian Doctrine") and indexing fails leaving indexing stuck at 99%

Indexer log below:

6740.LogosIndexer.log

I think this happened earlier today with some different resources but I didn't check logs.

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