I've just moved a site from a development domain to a live domain and now any forms that used the campaign monitor add-on are not working.
Forms which are not using the add on are working fine.
If I go to admin.php?page=gf_addons I get a message of "Add-On browser is currently unavailable. Please try again later."
If I go to plugins the "Gravity Forms Campaign Monitor Add-On" plugin says "Register your copy of Gravity Forms to receive access to automatic upgrades and support. Need a license key? Purchase one now."
I have re-copied and pasted the key from my account and re saved it, I've disabled and re-enabled the plugin, I've deleted the key, disabled the plugin, re-enabled the plugin and re-pasted the key. In fact, no matter what I do, it puts a tick beside the "Support License Key" input. Even if I type 'asdasda' into it and hit Save Settings, the page reloads with the same length of password dots and the tick is there.
I don't know what else to do, but I can't launch the site as it is now.
Any help would be greatly appreciated.
I've also tried the Gravity Forms Meta Recovery tool but that didn't help. I'm quite stuck.