When viewing the Event page it can be that you're seeing COM_JEM_EVENT_DESCRIPTION. This is a notice that will appear at your website if the translation is missing within the language file. It can appear if you're using a different language than the English one.
To resolve the problem:
- Go to the language file: components\com_jem\language\
- add
Well noticed that this will also be the case with a missing Venue description language-string COM_JEM_VENUE_DESCRIPTION. and there are probably more around.
Hmm, think we need to check if the language packages are up-to-date. In my case will take a look at the Dutch one, but that will after a few weeks and when there is some time for it.