Collaborate service giving error.

You should uninstall collaborate and switch to using a real source control system to share code.

Personally I use git because it is free and there are tons of tutorials out there to help you set it up.

As far as configuring Unity to play nice with git, keep this in mind:

Here’s how I use git in one of my games, Jetpack Kurt:

Using fine-grained source control as you work to refine your engineering:

Share/Sharing source code between projects:

Setting up the right .gitignore file:

Generally setting Unity up (includes above .gitignore concepts):