Issue Summary

When adding a value to a parameter of a particular macro (ConfiForms IFTTT Integration Rules macro), the macro fails to render in the new editor with a NullPointerException and undefined macro:

TypeError: Cannot read property 'parameters' of undefined
    at T (transformers.ts:80)
    at index.ts:330
    at s (runtime.js:45)
    at Generator._invoke (runtime.js:271)
    at Generator.e.<computed> [as next] (runtime.js:97)
    at n (asyncToGenerator.js:3)
    at u (asyncToGenerator.js:25)

{"statusCode":500,"message":"java.lang.NullPointerException: null"}

In old editor the error is:

"Macro placeholder request failed error: ''" (no stacktrace)

Sample code from vendor:
Line 583 from the attached code (IFTTT macro editor)

putIfNotEmpty(macroParams, 'formName', $('${H}macro-param-formName').val());

If this has a value then something goes crazy with placeholder generation

And some generic functions it uses (nothing fancy):

function putIfNotFalse(macroParams, type, val) {
if (val && (val === true || val === 'true')) {
macroParams[type] = val;
}
}

function putIfNotEmpty(macroParams, type, val) {
if (val != null && val !== '') {
macroParams[type] = val;
}
}

See more at https://ecosystem.atlassian.net/browse/DEVHELP-2840

Steps to Reproduce

1. Install Confiforms app
2. Create a new page and add a "ConfiForms IFTTT Integration Rules" macro
3. Do not populate "Action Form" parameter, see that the macro successfully renders
4. Try to add the same macro but populate the action form and see that macro fails to render with a NullPointerException
   
   DEVHELP-2840.webm

Expected Results

Macro should render properly

Actual Results

Macro does not render when parameter is populate and throws an NPE error

Notes

• Issue cannot be replicated with other macros
• I've asked Confluence Ecosystem team about it and have advised me to raise a ticket here (more notes in DEVHELP issue)

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available