If you find errors similar to these when accessing your website:
Or after enabling PHP errors display, it can be due to different reasons. Let's go over some of the more common reasons and how to fix them:
Website migration - if you recently migrated your website to Hostinger, it is possibly due to a different PHP version. Try changing your PHP version to match that of your previous hosting. If the issue persists, try to re-upload your website files
WordPress update - if the errors appeared after a WordPress core update, it indicates either one of your plugins or themes uses outdated functions that are no
longer supported or that something went wrong during the update. Try restoring your website from backups and updating the WordPress version once more. If the issue occurs again, you will need to replace the plugin or theme with an alternative compatible with the latest version of WordPress
Theme/plugin update - same as above, you will need to restore your website from backups and perform the changes again. If the update presents errors again, you will need to either reinstall the plugin or theme or find an alternative
If your website is not covered in the cases above, here are some additional steps that can help:
Increase the max_execution_time for your website
Additional resources:
If you are getting several PHP errors, check this article: How to identify and fix website errors
If the errors prevent you from accessing the WordPress admin panel, check this guide: How to disable WordPress plugins without access to the admin page