Fatal error: Uncaught Error: Undefined constant "RG_CURRENT_PAGE" in /customers/5/1/2/solarstars.de/httpd.www/wp-content/plugins/gravityforms/includes/addon/class-gf-addon.php:315
Stack trace:
#0 /customers/5/1/2/solarstars.de/httpd.www/wp-content/plugins/gravityforms/includes/webapi/webapi.php(80): GFAddOn->init()
#1 /customers/5/1/2/solarstars.de/httpd.www/wp-includes/class-wp-hook.php(324): GFWebAPI->init('')
#2 /customers/5/1/2/solarstars.de/httpd.www/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array)
#3 /customers/5/1/2/solarstars.de/httpd.www/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#4 /customers/5/1/2/solarstars.de/httpd.www/wp-settings.php(673): do_action('after_setup_the...')
#5 /customers/5/1/2/solarstars.de/httpd.www/wp-config.php(123): require_once('/customers/5/1/...')
#6 /customers/5/1/2/solarstars.de/httpd.www/wp-load.php(50): require_once('/customers/5/1/...')
#7 /customers/5/1/2/solarstars.de/httpd.www/wp-blog-header.php(13): require_once('/customers/5/1/...')
#8 /customers/5/1/2/solarstars.de/httpd.www/index.php(17): require('/customers/5/1/...')
#9 {main}
  thrown in /customers/5/1/2/solarstars.de/httpd.www/wp-content/plugins/gravityforms/includes/addon/class-gf-addon.php on line 315