Hi, the import error sounds like it could be related to this issue. Basically there were import errors if the sim language was set to French (FR/FR).
It should be fixed in version 1.1.1 of SimBrief Dispatch for MSFS. If not already done so, please update the add-on (either through Navigraph Hub or by redownloading and reinstalling from here) and let us know if you still have this issue.
Thanks,