Hi there,
Gosh, up till 2am! Okay, let’s get you pointed in the right direction.
Here’s the main link to the Shamrock theme. If you right-click on the featured image and select inspect, you’ll get a glimpse of what Shamrock prefers for its featured image dimensions.
<img width=”805″ height=”452″ src=”https://demo.mekshq.com/shamrock/wp-content/uploads/2014/11/sidewalk03-805×452.jpg” class=”attachment-smr-thumb wp-post-image” alt=”sidewalk03″>
Have a look here: https://screencast.com/t/VZJuav22p as well.
Please resize your image and repost. Let me know your results!
Best,
KC