Not allowed to save location

Hello,

When I try to add a new location to an existing map, I have this message :

You are not allowed to save changes!

And when I look in the Javascript console, there is this message (backend.js) :

Uncaught TypeError: $(…).wpColorPicker is not a function

When I try to add the same location to the same map, with the admin account, it works.

I use the plugin “Members” to manage the users roles and many months ago, I created a specific role that allows to use WP Google Map Plugin. Everything was working fine.

How can I resolve that problem ?

Thanks for your help !