If used in a wordpress site that has active plugins that use freemius wordpress-sdk there is a conflict
[17-Jan-2020 14:11:11 UTC] PHP Fatal error: Cannot make non static method Freemius_Api_Base::Test() static in class Freemius_Api_WordPress in /home/badlywi
red/public_html/wp-content/plugins/fullworks-anti-spam-pro/includes/vendor/freemius/wordpress-sdk/includes/sdk/FreemiusWordPress.php on line 704
[17-Jan-2020 14:11:11 UTC] PHP Stack trace:
[17-Jan-2020 14:11:11 UTC] PHP 1. {main}() /home/mydomain/public_html/wp-admin/plugins.php:0
[17-Jan-2020 14:11:11 UTC] PHP 2. require_once() /home/mydomain/public_html/wp-admin/plugins.php:10
[17-Jan-2020 14:11:11 UTC] PHP 3. do_action() /home/mydomain/public_html/wp-admin/admin.php:367
[17-Jan-2020 14:11:11 UTC] PHP 4. WP_Hook->do_action() /home/mydomain/public_html/wp-includes/plugin.php:478
[17-Jan-2020 14:11:11 UTC] PHP 5. WP_Hook->apply_filters() /home/mydomain/public_html/wp-includes/class-wp-hook.php:312
[17-Jan-2020 14:11:11 UTC] PHP 6. wp_update_plugins() /home/mydomain/public_html/wp-includes/class-wp-hook.php:288
[17-Jan-2020 14:11:11 UTC] PHP 7. set_site_transient() /home/mydomain/public_html/wp-includes/update.php:334
[17-Jan-2020 14:11:11 UTC] PHP 8. apply_filters() /home/mydomain/public_html/wp-includes/option.php:1832
[17-Jan-2020 14:11:11 UTC] PHP 9. WP_Hook->apply_filters() /home/mydomain/public_html/wp-includes/plugin.php:206
[17-Jan-2020 14:11:11 UTC] PHP 10. FS_Plugin_Updater->pre_set_site_transient_update_plugins_filter() /home/mydomain/public_html/wp-includes/class-wp-hook
.php:290
[17-Jan-2020 14:11:11 UTC] PHP 11. Freemius->get_update() /home/mydomain/public_html/wp-content/plugins/fullworks-anti-spam-pro/includes/vendor/freemius/
wordpress-sdk/includes/class-fs-plugin-updater.php:517
[17-Jan-2020 14:11:11 UTC] PHP 12. Freemius->check_updates() /home/mydomain/public_html/wp-content/plugins/fullworks-anti-spam-pro/includes/vendor/freemi
us/wordpress-sdk/includes/class-freemius.php:18962
[17-Jan-2020 14:11:11 UTC] PHP 13. Freemius->_fetch_newer_version() /home/mydomain/public_html/wp-content/plugins/fullworks-anti-spam-pro/includes/vendor
/freemius/wordpress-sdk/includes/class-freemius.php:20514
[17-Jan-2020 14:11:11 UTC] PHP 14. Freemius->_fetch_latest_version() /home/mydomain/public_html/wp-content/plugins/fullworks-anti-spam-pro/includes/vendo
r/freemius/wordpress-sdk/includes/class-freemius.php:18917
[17-Jan-2020 14:11:11 UTC] PHP 15. Freemius->get_api_site_or_plugin_scope() /home/mydomain/public_html/wp-content/plugins/fullworks-anti-spam-pro/include
s/vendor/freemius/wordpress-sdk/includes/class-freemius.php:20358
[17-Jan-2020 14:11:11 UTC] PHP 16. Freemius->get_api_site_scope() /home/mydomain/public_html/wp-content/plugins/fullworks-anti-spam-pro/includes/vendor/f
reemius/wordpress-sdk/includes/class-freemius.php:21644
If used in a wordpress site that has active plugins that use freemius wordpress-sdk there is a conflict
[17-Jan-2020 14:11:11 UTC] PHP Fatal error: Cannot make non static method Freemius_Api_Base::Test() static in class Freemius_Api_WordPress in /home/badlywi
red/public_html/wp-content/plugins/fullworks-anti-spam-pro/includes/vendor/freemius/wordpress-sdk/includes/sdk/FreemiusWordPress.php on line 704
[17-Jan-2020 14:11:11 UTC] PHP Stack trace:
[17-Jan-2020 14:11:11 UTC] PHP 1. {main}() /home/mydomain/public_html/wp-admin/plugins.php:0
[17-Jan-2020 14:11:11 UTC] PHP 2. require_once() /home/mydomain/public_html/wp-admin/plugins.php:10
[17-Jan-2020 14:11:11 UTC] PHP 3. do_action() /home/mydomain/public_html/wp-admin/admin.php:367
[17-Jan-2020 14:11:11 UTC] PHP 4. WP_Hook->do_action() /home/mydomain/public_html/wp-includes/plugin.php:478
[17-Jan-2020 14:11:11 UTC] PHP 5. WP_Hook->apply_filters() /home/mydomain/public_html/wp-includes/class-wp-hook.php:312
[17-Jan-2020 14:11:11 UTC] PHP 6. wp_update_plugins() /home/mydomain/public_html/wp-includes/class-wp-hook.php:288
[17-Jan-2020 14:11:11 UTC] PHP 7. set_site_transient() /home/mydomain/public_html/wp-includes/update.php:334
[17-Jan-2020 14:11:11 UTC] PHP 8. apply_filters() /home/mydomain/public_html/wp-includes/option.php:1832
[17-Jan-2020 14:11:11 UTC] PHP 9. WP_Hook->apply_filters() /home/mydomain/public_html/wp-includes/plugin.php:206
[17-Jan-2020 14:11:11 UTC] PHP 10. FS_Plugin_Updater->pre_set_site_transient_update_plugins_filter() /home/mydomain/public_html/wp-includes/class-wp-hook
.php:290
[17-Jan-2020 14:11:11 UTC] PHP 11. Freemius->get_update() /home/mydomain/public_html/wp-content/plugins/fullworks-anti-spam-pro/includes/vendor/freemius/
wordpress-sdk/includes/class-fs-plugin-updater.php:517
[17-Jan-2020 14:11:11 UTC] PHP 12. Freemius->check_updates() /home/mydomain/public_html/wp-content/plugins/fullworks-anti-spam-pro/includes/vendor/freemi
us/wordpress-sdk/includes/class-freemius.php:18962
[17-Jan-2020 14:11:11 UTC] PHP 13. Freemius->_fetch_newer_version() /home/mydomain/public_html/wp-content/plugins/fullworks-anti-spam-pro/includes/vendor
/freemius/wordpress-sdk/includes/class-freemius.php:20514
[17-Jan-2020 14:11:11 UTC] PHP 14. Freemius->_fetch_latest_version() /home/mydomain/public_html/wp-content/plugins/fullworks-anti-spam-pro/includes/vendo
r/freemius/wordpress-sdk/includes/class-freemius.php:18917
[17-Jan-2020 14:11:11 UTC] PHP 15. Freemius->get_api_site_or_plugin_scope() /home/mydomain/public_html/wp-content/plugins/fullworks-anti-spam-pro/include
s/vendor/freemius/wordpress-sdk/includes/class-freemius.php:20358
[17-Jan-2020 14:11:11 UTC] PHP 16. Freemius->get_api_site_scope() /home/mydomain/public_html/wp-content/plugins/fullworks-anti-spam-pro/includes/vendor/f
reemius/wordpress-sdk/includes/class-freemius.php:21644