[Plugin: Easy Nivo Slider] warning message: trim() expects parameter 1 to be string, array given in.

Did you manage to fix this?

I seem to be getting the same error,
Did any of you manage to fix this?

It’s a bit convoluted, but I seem to have fixed my problem.

I think that the easy nivo plugin was conflicting with the image resize options in my theme.

I installed the ‘Simple Image Sizes’ plugin, then once activated, I disabled the ‘Load Custom Image Sizes plugin’ checkbox within the Easy Nivo plugin.

Seems to have solved all my problems.

By deselecting the ‘Load Custom Image Sizes plugin’ checkbox within the Easy Nivo plugin. seemed to fix the issue for me with the featured image error.

but I also get an error once I click the nivo button to add an image/gallery to a page or post.
The pop up window opens but says

Notice: Undefined variable: options in C:\wamp\www\wordpress\wp-content\plugins\easy-nivo-slider\mce\popup_window.php on line 80 on the current post slider tab.

The following
Notice: Undefined variable: options in C:\wamp\www\wordpress\wp-content\plugins\easy-nivo-slider\mce\popup_window.php on line 65
as well as
Notice: Undefined variable: options in C:\wamp\www\wordpress\wp-content\plugins\easy-nivo-slider\mce\popup_window.php on line 80
appear on the featured image slider tab

The sliders work on my site but under them I see

debug=

Any suggestions?

I also noticed my slider navigation shows one more nav button than images.

i.e. if I have 3 images I have 4 nav links for images and the fourth nav button does nothing..

Strange

Thank You for your help!