Token makes form editor crash

Question

Hello friendly people,
 
I just wanted to create a form with a date selector and put a token here:

The token I have in my program is {{my.00_Webinar_Date}}. When I insert that, my editor crashes.

It's greyed out and nothing moves.

When I refresh my browser, my form looks like this:

As if the central frame didn't want to load anymore. There's nothing else I can except to delete that draft and start over.
 
Now here comes the _really_ wierd thing. It seems that this only occurs if my token starts with a numeral - like "0" in this case. I can save something like this:

That still makes my editor look very funky, but at least it's still functional:

Does anybody know what's going on here?

SanfordWhiteman · Accepted Answer

Not surprising because tokens are not JSON-escaped (and thus aren’t supported in this context, even if they sometimes appear to work). The form descriptor needs to be valid JSON. Very easy to break. In this case remember that JS variables and unquoted property names can’t start with a number — that’s probably the cause.

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