Preview Error: Cannot read property 'params' of undefined

After creating a few pages in an App I began getting the error below. Does anyone know how to fix it? I haven’t set up any complex features, logic, or authentication. I am only building pages. I’ve deleted two apps for this reason already and started over. Please help.

From Web Preview:
CONTEXT: Selector App, TIMESTAMP: 1592269943323, MESSAGE: Cannot read property ‘params’ of undefined TypeError: Cannot read property ‘params’ of undefined
at Object.getStateForAction (
at w (
at ()
at getStateForAction (

From Mobile Prview:
CONTEXT: App, TIMESTAMP: 1592271777359, MESSAGE: undefined is not an object (evaluating ‘t[F].params’)
map@[native code]
map@[native code]

Hi there!

Could you check if under ‘Navigation’ you have a deleted page listed as the home page (the top most entry). The navigation does not automatically update when you delete a page, and can cause this error to pop up.

Let me know if that works out!

Hi Akseli,

Yes, that did work. However, I’ve gotten several similar errors since where this was not the case. I must be doing something very wrong because I can’t create a single simple page without getting these errors.

All the errors reference Page 2, which is the default “Global Canvas” ( I though it was empty page). Is there something need to setup on that page prior to starting?

Here’s the latest.
Context for page.Page2 not found, event context canvas/page.Page2 remains unchanged
Invariant Violation: Objects are not valid as a React child (found: object with keys {}).
Invariant Violation: Objects are not valid as a React child (found: object with keys {}).
16 Jun 11:18:18 - [info] nodes.flows.started-flows
16 Jun 11:18:18 - [info] nodes.flows.starting-flows
Warning: RNCNetInfo - You are using the deprecated API. It will still work, but you must upgrade to the new API to receive the new features. The old API will be removed in the future