Original Post — Direct link
Have done all three of these in story mode. Fast traveled to Manning National Zoo to do it in Challenging for the Daily but I don't have the option to change the difficulty--the only line present in the pop-up frame is "Story" difficulty.

Trying to change the difficulty on the world map doesn't work either--tapping "G" just brings up a box with my username at the top and some lines that are empty of everything except some "x"s.

Please note that I can change the difficulty of every other mission I have previously completed(which is all of them except Coney Island and the raid).

Searching reveals this problem has been mentioned in topics on this forum and reddit. I have tried the suggestions brought up in those threads--logging out, exiting the game, rebooting my comp, etc. No joy.
about 4 years ago - Ubi-Shikallum - Direct link
Hey NemesisBP,

Are you able to show that you have completed the mission on Story before, then go back and attempt to change the difficulty?
over 3 years ago - Ubi-Mark. - Direct link
Hello KennBot,

Thanks for bringing this to our attention! This issue has been reported to the development team and they're working on a fix! Once it's resolved, we are going to let everyone know. Apologies for any inconvenience caused by this and if you have any additional questions, please let us know.