Fatal error: Uncaught Error: Class 'NF_FU_External_Loader' not found in /mnt/web404/b3/69/59509069/htdocs/wp-content/plugins/ninja-forms-uploads/includes/file-uploads.php:128
Stack trace:
#0 /mnt/web404/b3/69/59509069/htdocs/wp-content/plugins/ninja-forms-uploads/includes/file-uploads.php(90): NF_FU_File_Uploads->init()
#1 /mnt/web404/b3/69/59509069/htdocs/wp-content/plugins/ninja-forms-uploads/file-uploads.php(27): NF_FU_File_Uploads::instance()
#2 /mnt/web404/b3/69/59509069/htdocs/wp-content/plugins/ninja-forms-uploads/file-uploads.php(31): NF_File_Uploads()
#3 /mnt/web404/b3/69/59509069/htdocs/wp-settings.php(377): include_once('/mnt/web404/b3/...')
#4 /mnt/web404/b3/69/59509069/htdocs/wp-config.php(118): require_once('/mnt/web404/b3/...')
#5 /mnt/web404/b3/69/59509069/htdocs/wp-load.php(37): require_once('/mnt/web404/b3/...')
#6 /mnt/web404/b3/69/59509069/htdocs/wp-blog-header.php(13): require_once('/mnt/web404/b3/...')
#7 /mnt/web404/b3/69/59509069/htdocs/index.php(35): require('/mnt/web404/b3/...')
#8 {main}
  throw in /mnt/web404/b3/69/59509069/htdocs/wp-content/plugins/ninja-forms-uploads/includes/file-uploads.php on line 128