To avoid these issues, check whether new plugin or theme is compatible with the version of WordPress. As alternative, you can downgrade WordPress to version that is compatible with your PHP version. . To fix this problem, you can downgrade WordPress until the developers release new update for this plugin or theme. The easiest way to downgrade WordPress core is to restore backup that was made before the update. you can install WP Downgrade plugin. Next to WordPress Target Version, enter the number for WordPress core update you want to use.. It works to WordPress plugin updater, and it allows you to move to version instead of new one... You can also use the WP Rollback plugin to downgrade your WordPress theme. In your control panel, find PHP manager and select PHP version you want to use. ... It's crucial to update WordPress to the version to protect against known vulnerabilities and to maintain the integrity of your website...
Read more