Today I realized this change occured and I changed the “permalink prefix” back to the original. But, the page is not found when accessing the original address (the 1st one above). I tried to use the landing page editor and executed an “update all” to ensure the prefix is active, but that had no apparent effect.
Is there something else that has to be done to make the updated permalink prefix active?
This is the first I’ve heard of the prefix reverting. This is something I will keep an eye out for a possible fix.
After changing the prefix back, head into your permalink settings and resave them and the change should kick into gear. If that doesn’t work try deleting your .htaccess file inside your WordPress base directory and then resaving permalinks.
If that doesn’t work either, pls let me know. Something else must be going on.