Ticketing error: Value must be less than or equal to -1 Post date Home › Forums › Ticket Products › Event Tickets Plus › Ticketing error: Value must be less than or equal to -1 This topic has 8 replies, 3 voices, and was last updated 7 years, 7 months ago by Support Droid. Viewing 1 post (of 1 total) Author Posts February 20, 2018 at 10:47 pm #1459455 Support DroidKeymaster This support thread is private. Author Posts Viewing 1 post (of 1 total) The topic ‘Ticketing error: Value must be less than or equal to -1’ is closed to new replies. → Please verify your API key is correctly entered on the settings