I was testing the latest dev over at simplytest.me and I got this while typing in the search field in the add blocks form (/#overlay=admin/structure/block/list/block_plugin_ui%253Abartik/add):
An AJAX HTTP error occurred.
HTTP Result Code: 200
Debugging information follows.
Path: /system/autocomplete/block_plugin_ui%3Abartik
StatusText: OK
ResponseText:
Fatal error: Class 'plugin.manager.block' not found in /home/hash/www/core/modules/system/system.module on line 1162Funny thing, when I tried the same thing on a local dev I got no ResponseText/Fatal info and the error code was 500:
An AJAX HTTP error occurred.
HTTP Result Code: 500
Debugging information follows.
Path: /system/autocomplete/block_plugin_ui%3Abartik
StatusText: Internal Server Error
ResponseText: