It says that "This profile is currently disabled.". Thus, I can not follow you

I have just followed favdesu successfully.You can understand it as because the follow button changed to Unfollow.

You might not be fully synced, in order to retrieve the latest activities of the social network (posts, shares, likes, profiles etc) you need to be fully synced, the wallet will say
Oke and then unlocked it and confirm the API call (pop up window) to follow.
or you don't have an active profile. in order to follow you have to setup a profile too