[Plugin: Custom Field Template] Custom field tinyMCE only shows for admin

Hi, I′m having problem using this plugin on a multiuser site. I added a textfield with html and tinyMC editor, and everything works just fine for my user. But other users only see an empty box when they try to make a post, even if I set there role to admin they still only get the empty box while I get everything.

The custom field is on a custom post if that makes any difference.

Ideas about what can be at error here?

https://www.ads-software.com/extend/plugins/custom-field-template/