Thank you for your post. If you can please contact us via help.avenzamaps.com and provide one or two of the maps you are trying to bulk import, as well as more info on where you are hosting the maps (e.g. Dropbox, Google Drive, etc.) and the .avenzamaps file, we will be better able to help troubleshoot this for you.
Adobe released an update to Illustrator 2021 (v25.3) that includes native support for M1 Devices and Rotate Artboard functionality. Please note these features are not yet supported within MAPublisher at this time. See compatibility notes.