The "node" entity cannot have a URI as it does not have an ID in Drupal\Core\Entity\EntityBase->toUrl() (line 161 of core/lib/Drupal/Core/Entity/EntityBase.php).

Something strange has happened. I created the MR but when I clicked on the link after the push I had no access. I passed it to my partner paucala and he was able to access it.

This is a bit strange, as this code is more-or-less taken from core Content Translation module. So, you'd think you would also see this error when Content Translation is in use.

However, I can look into trying to reproduce this...