I have made some theme fragments for a customer, but when they use one of the fragments on their site they got a 502 error when editing (They can't give me too much information at the moment). Basically, that fragment is just 9 textfields (zope.schema.TextLine).
In my own setup, it works as it should. Also if I try with Apache in front.
In their setting, with nginx, it does not.
In their setup, if I access the site by 'zope url' http://someip/Plone/somepage it works as it should.
Any suggestion on what they should look for ?