When editing a link in the broken link list, I mostly get
The link could not be modified. The following error(s) occurred : * The page template is invalid.
It updates the link on the affected page alright, but throws the above error message, and in the broken links list, the old address is still there. If I retry the same link, the same happens.
This happens in >90% of cases, can't find a pattern.
This happened also before the 3.8 update.