If everything works fine, Helldivers 2 allows me to set the difficulty of the missions. But sometimes there is an issue that prevents me from doing so. Here is how to fix the Helldivers 2 "Cannot unlock difficulty" error.
How to change the difficulty in Helldivers 2
Helldivers 2 has a very complicated difficulty system that allows players to fine-tune their difficulty settings. There are nine difficulty levels, from Trivial to Helldive, and it’s quite annoying for players that they can’t unlock all of them. Here are some ways to solve this problem.
To fix the "difficulty not unlocking" error in Helldivers 2, you will need to host your game. Checking your files may also help, as well as reinstalling the game. If nothing works, report the issue to the developers and wait for a bugfix patch. Below is a complete list of possible solutions for the Helldivers 2 "Difficulty not unlocking" error.
Related: All Weapons in Helldivers 2 and How to Get Them
