Thank you for your reply.
I didn’t use “WordPress Flash Uploader”.
I am using “Sync Media Library”.
Access a Dashboard > Media > Sync Media Library
If PHP version 7.0 or over, I get an error.
“There has been a critical error on your website.”
If PHP version 5.6 or under, that it is working correctly.
debug.log↓
PHP Fatal error: Uncaught Error: Non-static method WFUSync::printSync() cannot be called statically in /○○/wp-content/plugins/wordpress-flash-uploader/wordpress-flash-uploader.php:171
Best regards.
