Strattic supports WordPress 5.7 and above.
As of November 1st, 2022, Strattic no longer supports WordPress versions below 5.7.
In order to utilize Strattic publishing, and benefit from the most recent WordPress performance and security enhancements, we highly recommend that you update WordPress.
You can easily update by going to the WordPress Dashboard > Updates.
You may want to back up your site first, which you can do in your Strattic dashboard under Site Details > Backups > Backup Now.
Please do not hesitate to contact us via our live chat if you need assistance.