Hi
There is similar problem posted in stackoverflow, Please have a look at the same :- http://stackoverflow.com/questions/29379169/aem-component-not-displayed-on-preview-mode
//The problem found out be be in their custom code.
comment from the post :-
I was using Column Control (sightly version) as a guide and figured out that the following code was what was causing the issue:
if (typeof wcmmode != "undefined" && wcmmode.isEdit())
Thank you for helping me debug this issue.
you will be getting something in log file when you go to preview mode. can you share the error?
Thanks and Regards
Kautuk Sahni
Kautuk Sahni