Tails Installer sometimes fails with: No support for modifying a partition a table of type `PMBR'

I’ve seen it on Jenkins, and it was reported during the initial porting to udisks2, as the source code says:

        # XXX: this sometimes fails with:
        # tails_installer.creator.py, line 940, in partition_device
        #    system_partition.call_set_type_sync(ESP_GUID,
        #        GLib.Variant('a{sv}', None))
        # Error: udisks-error-quark:
        # GDBus.Error:org.freedesktop.UDisks2.Error.NotSupported:
        # No support for modifying a partition a table of type `PMBR' (11)

Parent Task: #10988 (closed)

Related issues

• Related to #16168 (closed)

Original created by @intrigeri on 10987 (Redmine)