We are using your theme here: https://skab.ethermedia.hu/ and are really loving it.
The only issue I have, is that we would like to use the popular Essential Grid plugin to display our gallery items.
We have the latest version installed of Essential Grid. We turned off all of the plugins to test, and this is the error message that we receive:
I understand, that third party plugins are not covered, but maybe there is an easy fix for this that comes to mind. Essential Grid worked with other themes we used in the past, and it is a pretty popular plugin so I would be surprised if Airi would not support it.