On the mobile veiw there are 3 bars showing which opens a menu for 'off canvas'. I'm not sure what this would be used for, so would like to disable it so it doesnt give a confusing error message to users.. Thanks
Which off-canvas menu button are you referring to? Are you referring to the one from the Charm template? The icon here renders the site menu on a mobile device.
Of course I may not have the site configured in the way charm as easysocial is designed to be, there's quite a few es modules but I'm not sure what ones do what and where they should be published etc. Do you think that could be the reason?
The main advantage of using the hamburger menu on mobile is so that you can place a menu on that position(this is how it looks like when I place a menu module: https://take.ms/b0vAE).
As for other modules, you would have to try them and see what fits.
However, if you really want to hide the offcanvas toggler button on all devices, you can use the custom css below.