php warning back after migrating to Genesis Blocks

Hello, the topic mentioned here is back now: https://wordpress.org/support/topic/php-notice-in-wp-admin-with-wp-5-3-0-debug-mode/
because with migration from atomic blocks to genesis blocks plugin the atomic blocks plugin is disabled. The warning appears when atomic blocks theme is enabled and atomic blocks plugin is disabled (that now has to be disabled because of genesis blocks plugin). Disabling the genesis blocks plugin doesn’t help.