Hi
The only way to understand what is wrong is to change WP_DEBUG to true and add two more constants like this:
define( 'WP_DEBUG', true );
// Enable Debug logging
define( 'WP_DEBUG_LOG', true );
// Disable display of errors and warnings
define( 'WP_DEBUG_DISPLAY', false );
After that deactivate and then activate the plugin, go to ‘/wp-content/debug.log’
And paste the content here.