Yes, even although our plugins are tested they can crash. That is a shame, and we will happily want to fix those issues!
To help use quickly identify what is going on, please first update the plugin the latest version. Perhaps the issue is caused by a bug in the plugin which is already solved!
If the problem persists after updating the plugin, please enable the WP_DEBUG setting in the wp-config.php file of your WordPress installation with the following settings:
define( 'WP_DEBUG', true );
define( 'WP_DEBUG_DISPLAY', false);
define( 'WP_DEBUG_LOG', true );
(make sure that WP_DEBUG is only listed once in the file!)
After this, please trigger the same issue again and take a look at the wp-content/debug.log file. Are there any errors logged caused by the plugin?
If the error messages don't help you to solve the problem, or if you don't see any error messages at all, feel free to submit a support ticket and attach the debug.log file (If larger than 1MB, please use wetransfer.com)!