[1.16.5] Executing runClient with extra mods

[ImNotJahan]

It'd be a lot easier to test out my mods by using the help of other ones, but whenever I add a mod to the run/mods folder I get a ton of ClassNotFoundException(s). Same thing also used to happen back when I did 1.12.2 modding, so I'm guessing either you just can't with the forge mdk, or that I've got something wrong in my build.gradle/run configurations. 

[Luis_ST]

you have to add them via dependencies screach for it in the gradle sub forum there are many threads about this topic