Security fix
* Fixed an insecure deserialization issue. Huge thanks to the Patchstack team for their help on this one.
- Bug fixes
- Fixed a number of PHP warnings that could occur when certain system-related events were generated (6024, 6025, 6035, 6036, 6037, 6041, 6042, 6001, 6002, 6003, 6005, 6004, 6044, 6040).
- Fixed an edge case issue in which periodic emails were not sent due to some issues with the cron job.
- Fixed translation loading errors appearing in the Query Monitor plugin (translation loading too early in some cases).