Thank you for contacting us, we are happy to help in any way we can.
Generally the cause of this particular problem is a conflict with another plugin installed on your website and most likely it is related to one that tries to add more features to the content editing interface.
I recommend trying to systematically deactivate any non-BoldGrid plugins that add things like galleries, sliders, or even contact forms to see which one is the source of the conflict.
I hope that helps you get your page editing tools working and please let us know if you have any other questions.