tigermediamao

@bundfegadmin if you rename the plugin folder name inside wp-content/plugins -> enter the site -> rename back to original name, it will give you same result as disable / enable.

For us, the error was caused by WSAL not being able to find the wp_options setting “wsal_built-in-notifications”.

We created and inserted dummy serialized data into key directly in db for affected sites and it worked again.
a:6:{s:26:"daily_summary_notification";b:0;s:19:"daily_email_address";s:0:"";s:31:"daily_send_empty_summary_emails";b:0;s:27:"weekly_summary_notification";b:0;s:20:"weekly_email_address";s:0:"";s:32:"weekly_send_empty_summary_emails";b:0;}

Hopefully this will be fixed in next update.