Hello,
I have a problem with the custom fields. Using Joomla! 3.4.3 - _ Virtuemart 3.0.9  - CleanMart 3.7.
I do not know if it depends by the update to version 3.7 of CleanMart, because I have not noticed right away, but since I upgraded the backend Virtuemart 3.0.9  the tab "Custom Fields" sheet product, if I want to insert a field, nothing happens! It appears below the selector field chosen.
What could I have done?

Ciao,
Pino ...

Hi,

You should be aware that, CleanMart is a template. Templates are active only in the front-end. They are absolutely no effect in the backend of Joomla or backend of Virtuemart.

Looks like your problem is related to Virtuemart backend (if i didn't misunderstand you) thus this failure can't be related to our template CleanMart.

But try this;

#1) Add the custom field like normal, don't touch anything, and click "SAVE". Sometimes the custom fields (especially the plugin based ones) starts working normal after the 1st page refresh.

#2) On the page where you are experiencing this problem, open the Browser Console (For Chrome browser, it is here: View >> Developer >> JavaScript Console), and check if there are any red jQuery conflict error messages (TypeError)

Regards.