I just ran into this issue after having a forced update from Win 10 N to Win 11 N.
While the Powershell command above may have worked for others, to me it unfortunately failed in finalization, according to the log.

The command did provide the solution for me, however, I just went through Settings ...

Thanks for a great mod, therax!

I may have discovered a (minor) bug:
When a belt is fully compressed and less than 50% of the total belt capacity is consumed, miniloaders seem to only pull items from a single lane of the belt. Seems to be consistently left side.

I realize this may be a side-effect ...