Erick,
MS just released a new version of the plugin on github. They let me know that this issue should be fixed in the new version:
https://github.com/MSOpenTech/moodle-assignfeedback_onenote/issues/1#issuecomment-108051300
-Tony
Re: Backup Error. Error code: multiple_optigroup_duplicate_element
by Tony Box -
Number of replies: 0