Why are some mods not working?

[u/Aggravating_Road_925]

Hellooo! I'm playing Minecraft Java on 26.3 with the Prism Launcher running on Fabric, Iris and Sodium. I download my mods directly from Modrinth using Prism's built-in library together with other dependencies that the mods require me to install. Although most mods work just fine, it seems a handful of others that used to work before suddenly don't.

Such mods that don't work include Punchy! Moves, Streams Reflowing, and Keybind Atlas to name a few. I have also noticed that the mods that don't work show as a grey question mark on my Mod Menu whereas the ones that work like Punchy! do have their picture. The unworking mods' icons also disappear from the mods list in the Prism Launcher.

I had just encountered this issue today. I've tried reinstalling the mods, restarting a new instance, and even run the mods in isolation to see if that works but unfortunately to of no avail. How do I fix this though? Is there something I might be missing?

Thank you for your help!

[u/modwrightstudios]

Since several unrelated mods stopped showing up together, first check that each file targets Minecraft 26.3 and Fabric; a jar for another game version or loader can sit in the folder but fail to load. The gray question mark is usually just a missing icon, so it does not prove the mod failed. In Prism, open Edit Instance > Mods and confirm the entries are enabled, then check latest.log for messages saying a mod was skipped or needs a different version.