When I click on an image on the front end of our site I get a page that says "Omeka has encountered an error" but does not tell me anything else. Click this link (http://exhibits.boxeldermuseum.org/exhibits/show/2015intlquiltexhibit/margarete-heinisch/mh-alpinemeadows) and then click the image.
Have you (or your tech person) turned on error logging? The messages in that log would help.
We looked at the logs and the issue seems to be Scripto. We deactivated it and were able to enlarge the photos. But when we turn Scripto back on we get the error page again. We don't understand why Scripto is the problem. We changed some of the configurations in Scripto and it appears to be working now. We changed the "openlayers" setting but do not find that in the error codes.