I have created a new clean install of wordpress on hidden link as I am having the exact same issue on hidden link - I am trying to simply add fields to a new custom post type. I get as far as clicking the button to add a new field and it opens up the box with the options, but it then does nothing.
I have no other plugins activated except wp-types activated/installed and using the TwentyFifteen theme.
I have confirmed with my host that I have 128m memory allocated to wordpress.
Interestingly, On the General Tab of the Toolset Settings (screenshot attached), I am unable to change any settings - it keeps returning "Saving Failed. Please reload the page and try again"
I don't appear to have any option to provide debug information.
Hello. Thank you for contacting the Toolset support.
Sorry to hear that Types plugin is not working as it should be on your install.
1)
Could you please activate WP_DEBUG from wp-config.php file and send me possible errors for review.
2)
In case you think that Types or Views are doing something wrong (what we call a bug), you should enable PHP error logging. Again, edit your wp-config.php file and add the following: