We've been getting the following "site health" email on a few of our sites running Types on WP 5.2, for the past few days. Within the past hour, we received such emails for 3 more sites.
All of them have the same error:
Error Details
=============
An error of type E_ERROR was caused in line 6 of the file /home/s1880/html/wp-content/plugins/types/vendor/otgs/installer/includes/class-otgs-installer-source-factory.php. Error message: Uncaught Error: Call to undefined function WP_Filesystem() in /home/s1880/html/wp-content/plugins/types/vendor/otgs/installer/includes/class-otgs-installer-source-factory.php:6
Stack trace:
#0 /home/s1880/html/wp-content/plugins/types/vendor/otgs/installer/includes/upgrade/class-otgs-installer-upgrade-response.php(128): OTGS_Installer_Source_Factory->create()
#1 /home/s1880/html/wp-content/plugins/types/vendor/otgs/installer/includes/upgrade/class-otgs-installer-upgrade-response.php(63): OTGS_Installer_Upgrade_Response->append_site_key_to_download_url('hidden link...', 'KpXGDFQIDx', 'toolset', 'hidden link...')
#2 /home/s1880/html/wp-includes/class-wp-hook.php(288): OTGS_Installer_Upgrade_Response->modify_upgrade_response(Object(stdClass))
#3 /home/s1880/html/wp-includes/plugin.php(208): WP_Hook->apply_filters(Object(stdClass), Array)
#4 /home/s1880/html/wp-includes/option.php(1815): apply_filters('pre_set_site_tr...', Object(stdClass), 'update_plugins')
#5 /home/s1880/html/wp-includes/update.php(332)
None of the sites appear to have any actual problems on the front end nor the back end so this isn't critical, but since we're now getting the error on several sites I wanted to submit a ticket and ask for assistance or clarification.
I referenced hidden link at the top, and that's the site the Debug info is from also, but we now have gotten message on 5 or 6 sites and at this rate I figure we're going to be receiving more.
Thank you!
