After running the curl command I get the following during the start of the update process:
Updating Mail-in-a-Box to v76 . . .
remote: Enumerating objects: 1, done.
remote: Counting objects: 100% (1/1), done.
remote: Total 1 (delta 0), reused 1 (delta 0), pack-reused 0 (from 0)
Unpacking objects: 100% (1/1), 244 bytes | 244.00 KiB/s, done.
error: Your local changes to the following files would be overwritten by checkout:
management/templates/aliases.html
Please commit your changes or stash them before you switch branches.
Aborting
Update failed. Did you modify something in /root/mailinabox?
I’ve done nothing to modify /root/mailinabox.
I ran sudo mailinabox to reconfigure everything and all is working (with the exception of nextcloud which I believe is a problem with php update).