I did some research and found there was a recent post on the Dynamics GP Support and Services Blog where they covered this same issue. The blog post was only four days ago and they acknowledge the issue is ongoing and offer the workaround of downgrading Microsoft Office to work around the issue (I did this recently when sending emails using MAPI caused Dynamics GP to crash).
The problem does not just affect the Word template reports from Workflow Batch Approval emails, but also the Word templates used for sending purchase or sales orders, remittances and so on. For the non workflow Word templates, you could reconfigure the templates to use PDF, or one of the other formats, instead of Word, but, unfortunately, this option is not available for the batch edit lists.
Following the initial report, we've had a number of other clients report the issue, so it may be worth preempting problems and block Office updates for Dynamics GP users until a fix is in place from Microsoft."
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