Hi @Thomas Pirro ,
Welcome!
If the "Use an email to send an invitation" feature you mentioned means like below:
According to my test, errors like yours would indeed occurs if you are using Outlook 64 bit version due to compatibility factors.
And seems it could only work fine when using Outlook 32 bit version Outlook. So, it is suggested for you to try switching to 32 bit version Office installation and see if your issue could be resolved.
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