Hi,
Thanks for your trust for giving me access to your admin site, highly appreciated.
I was able to find the problem.
The issue is probably caused by the plugin System - RokGZipper.
After disabling a few and after disabling RokGZipper the page showed up.
So, I re-enabled the others and left RokGZipper disabled.
This plugin compresses or bundles active javascripts and general css on your site in order to speed up the pageload. This might work for a number of other extensions but it's likely not compatible with Ninjamonials Testimonial Rotator.
Therefore I tried to exclude almost every file of the Ninjamonials Rotator but to no avail.
The best solution I have right now is to leave the RokGZipper disabled in order to make the Ninjamonials Testimonial Rotator work on your site.
In general the issue you have experienced is caused by javascript or css conflicts. I also noticed you have pretty much extensions installed that could be involved. So I can't exactly say that the plugin System - RokGZipper is the culprit but it helped solve the issue by disabling it.
When there are many javascripts or css files loaded at one page at the same time then the chance of a conflict is greater than when you haven't. Also, third party extensions that are used for compressing javascripts and css could be causing trouble in general in case there are many involved.
I hope you understand what I'm trying to explain.
If you have further questions, please do ask.
Thanks again for your assistance on this.
Kind regards,
John