Hello! I've been having some tech issues with Forge lately. I was wondering if anyone could help. In the screenshot you can see that Forge requests mods downloaded? (I think.) After I download such mods, It asks me to download other ones. Even after downloaded, I get the same messages! I don't know wy this is, or how I can fix it. Any help is appreciated! (Sorry if this is a dumb question!)
In the case of the screenshot it's asking for Thaumcraft and that version of the mod for 1.7.10, if you have any addons or mods that might require elements in other mods then that is why. Just make sure to check the dependency (other mods, APIs, libraries) when downloading mods and put mods in 1 by 1 to see what happens and what is requesting something or is conflicting with others. But in this case I assume it just needs Thaumcraft for something due to what items another mod may use.
Even in modpacks if you have some that need updated versions it will let you know (but that's usually if the modpack creator didn't check).
It's not a stupid question, I do this sometimes myself even as someone with experience in modding the game often and with 4 different modloaders (Forge, Liteloader, Rift & Fabric) and on 1.7.10 to 1.16.4 depending on what I feel like playing.