Too many active changes git warnings

Those are Atom IDE generated files. Add this to the .gitignore file:

.atom/

If the file not exists, create one in the root of the repository

It looks like you just forgot to ignore all of the generated files in your git directory. You need to find the directory and add it to your .gitignore file. Lets say the directory name is node_modules, so your .gitignore file content should be something like this

node_modules/

Using this way, those all active changes files will be ignored.

If a user sees that message it is most likely, that his git repository root is at the different directory, and probably is at the much higher directory (comparing to his/her repo). It can be checked by running:

git rev-parse --show-toplevel

If that's the case, then deleting hidden folder .git from this higher directory will solve the case.