Problems uploading Custom Theme to online wordpress server.

Hello everyone i hope all is well. I created a custom theme from scratch and my theme works fine locally (no problems). (I’m using MAMP) As soon as I try to upload my theme to my WordPress server nothing shows up in appearance section. I’ve created my custom theme in a zip file and uploaded it and wordpress tells me it installed successfully, so then I click on the active link and receive a message saying, “The active theme is broken. Reverting to the default theme” I don’t know what to do. I’ve been at this for days and googling non stop and can’t find any help!!! If any one can help I know you guys can help. Thanks in advance!!!