Clicking Format->Settings Does Nothing

correction, updated composer from ^4.8 to 5.0 fixed this for me.

from
"drupal/views_slideshow": "^4.8",

to
"drupal/views_slideshow": "^5.0",

I can confirm upgrading to 5.0 fixed the issue. Thanks to crutch for suggesting this!!!

I am getting this error with 5.0.x-dev and 5.0.0.

The console shows:

{
"message": "\nAn AJAX HTTP error occurred.\nHTTP Result Code: 200\nDebugging information follows.\nPath: /admin/structure/views/ajax/display/test_carousel_view/block_1/style_options\nStatusText: OK\nResponseText: Warning: Array to string conversion in /app/web/core/lib/Drupal/Core/Render/Element/Checkbox.php on line 129\n[{\"command\":\"settings\",\"settings\":
....

}

So 5.0 did not fix the issue for me.

Forgot to mention I am on PHP 8.1.18.
I have create a Merge Request that resolves this settings issue for me.
Basically some of the form elements in the Settings form were passing an array in as a default value to the checkbox element.

Updated the Remaining Tasks.