Is there any incompatibility between Zyxel access points' captive portals and Chromebooks?

Hi @FelippeSic ,

You can use this article as a guide to configure the external captive portal.

If you continue to experience the error after following these steps, please share a screenshot of the error message.

By the way, please enable Zyxel support and provide us with the name of your Nebula organization/site here or via the private message by clinking to my account > Message.