A tool to dynamically assemble mods to handle inter-mod dependencies and reduce conflict potential. · By onionsquid
Some of the custom weapons like the suppressed striker v3 is missing an icon and can't equip in missions. How to fix?
https://itch.io/t/1755243/solved-problem-with-content-pack-custom-weapons
Try this.
Check you are offline and remove all other mods to test. If that does not help, you can also try repairing the game files via Epic and then update your mods with the framework again.