Problems in combination with two other plugins

Hi there,
1st of all thank you very much for this useful plugin, it is really a good option to secure several activities….
Currently I’m not able to use it as is causing problems with HappyForms in combination with NextGen Gallery.
As long as “Advanced noCaptcha & invisible Captcha” is activated I’m not able to use HappyForms, here is the error message I received:

Fatal error: Uncaught Error: Class ‘anr_captcha_class’ not found in /wp-content/plugins/advanced-nocaptcha-recaptcha/functions.php:101 Stack trace: #0 /wp-includes/class-wp-hook.php(286): anr_wp_footer(”) #1 /wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #2 /wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /wp-includes/general-template.php(2630): do_action(‘wp_footer’) #4 /wp-content/plugins/nextgen-gallery/non_pope/class.photocrati_resource_manager.php(195): wp_footer() #5 /wp-content/plugins/nextgen-gallery/non_pope/class.photocrati_resource_manager.php(225): C_Photocrati_Resource_Manager->output_buffer(true) #6 /wp-includes/class-wp-hook. in /wp-content/plugins/advanced-nocaptcha-recaptcha/functions.php on line 101

As I’m dependant on NextGen and HappyForms I had to deactivate your plugin, not happy about but no way out.
Would be great if something could be fixed here.

Thx in advance
Marcus