Hello,
I am currently using JA Builder version 2.0.2.
When I try to add a block to a page, the preview images of the blocks do not appear. As you can see in the screenshot, the placeholders are shown instead of the illustrative preview images.
This issue had already occurred about a year ago globally for all users, and it was fixed at that time.
Unfortunately, the problem has now reappeared and is affecting all of my websites again.
Could you please check and fix this bug once more?
Thank you for your support.

Best regards.