I'm not sure if this issue is the same as the other ones filed in the queue.
Our users have reported this on our site as well after we migrated to 10.2. Adding blocks through Layout builder gives us an exception:
An error occurred during the execution of the Ajax response: TypeError: Cannot read properties of undefined (reading 'style')
(anonymous) @ ajax.js?v=10.2.0:1143
Promise.catch (async)
Drupal.Ajax.success @ ajax.js?v=10.2.0:1141
success @ ajax.js?v=10.2.0:584
which seems to be triggered by this error:
error = TypeError: Cannot read properties of undefined (reading 'style') at Object.resetPadding (https://[site]/core/misc/dialog/off-canvas/js/off-canvas.js?v=10.2.0:323:46)
Tested on Drupal 10.2.0