Adding Forms to Sharepoint  online.

it seems the only for forms to work is to give the users edit rights to the entire site?

Users have full edit rights to the list in question and can use the default sharepoint list form to submit new items. 

Installed forms in sharepoitn online - I can edit and publish the forms linked to the sharepoint list just fine. I can submit data just fine.  However, users can not access the form, it just shows the loading nintex spinner and never loads.

Users have read only rights to the site and permissions are broken up by list or access needs. 

If i give my test user full edit rights to the Site (already has full access tot eh list in question) the form then loads.

I dont want to give users full edit rights to the site, but they should be able to enter form data to kick off a work flow