{{msg?.payload} in markdown breaks the entire dashboard

[rcarmo]

Current Behavior

I mistakenly forgot to close the second bracket pair in:

{{msg?.payload}

And the entire dashboard vanished, without any hint as to where the error might be.

Expected Behavior

I should get either a runtime error or an error message rendered in the dashboard

Steps To Reproduce

Create a markdown node and set the contents to

{{msg?.payload}

Season to taste, deploy, and try to access the dashboard

Environment

• Dashboard version: 1.8.1
• Node-RED version: 3.1.9
• Node.js version: whatever is shipping in the node-red Docker image
• npm version: whatever is shipping in the node-red Docker image
• Platform/OS: macOS
• Browser: doesn't matter. Fails on Edge, Safari, Firefox..

Have you provided an initial effort estimate for this issue?

I am not a FlowFuse team member

[joepavitt]

This is very difficult for us to improve as all of that error handling is controlled by Vue/Browser internals.

Not sure there is anywhere we have that we could intercept, but I will investigate