GUI scripting "Subler" to choose artwork

Does anybody have experience scripting “Subler”?

I am having a problem trying to GUI script choosing artwork.
When you have a mp4 file open in Subler and choose “Search metadata online…” from the “Import” sub-menu of the “File” menu, a sheet appears for you to select the metadata. When you choose “Add” button, the sheet changes to show artwork available with and “Set as artwork” button.
I can’t seem to find a way to GUI script choosing an item in the window.

Any help would be appreciated

What does this get you?

image 1 of UI element 1 of scroll area 1 of tab group 1 of splitter group 1 of window 1 of application process "Subler" of application "System Events"

NB Subler v1.16.10. Also, while I can add an image to the artwork pane, I don’t get a ‘set as artwork’ button.

Then you’re in the wrong area. Do you have a sheet open?

choose “Search metadata online…” from the “Import” sub-menu of the “File” menu

p.s. I’m using Subler v1.7.5

I did try that but from the resulting screen, while I can select an image, I cannot do anything with it thereafter.

How were you able to select the image?