TypeError: Cannot read properties of null (reading '__errors') in Form.filterUndefinedErrors

[christian-fischer]

Prerequisites

• I have searched the existing issues
• I understand that providing a SSCCE example is tremendously useful to the maintainers.
• I have read the documentation
• Ideally, I'm providing a sample JSFiddle, Codesandbox.io or preferably a shared playground link demonstrating the issue.

What theme are you using?

core

Version

5.20.0

Current Behavior

We noticed the following error:

TypeError: Cannot read properties of null (reading '__errors')
    at  (../node_modules/@rjsf/core/src/components/Form.tsx:611:79)
    at iteratee (../node_modules/lodash/_createBaseFor.js:17:10)
    at baseFor (../node_modules/lodash/_baseForOwn.js:13:19)
    at eachFunc (../node_modules/lodash/_createBaseEach.js:17:13)
    at func (../node_modules/lodash/forEach.js:38:9)
    at errors (../node_modules/@rjsf/core/src/components/Form.tsx:608:15)
    at filterUndefinedErrors (../node_modules/@rjsf/core/src/components/Form.tsx:612:10)
    at iteratee (../node_modules/lodash/_createBaseFor.js:17:10)
    at baseFor (../node_modules/lodash/_baseForOwn.js:13:19)
    at eachFunc (../node_modules/lodash/_createBaseEach.js:17:13)

Expected Behavior

No error

Steps To Reproduce

So far I've been unable to reproduce this issue.

But based on the stacktrace I could pinpoint it to this location:
4d3094c#diff-704dadefdc8b52ac02d6712540e5734214e9699c66d1d673ded1c57e96df9303R611

Looks like this was newly introduced with version 5.20.0

Environment

- OS: Mac OS X 10.15.7
- Node: v20.11.1
- npm: 10.8.2

Anything else?

Proposed solution:

• it might mitigate the issue to replace the check for undefined in line 609 of Form.tsx with a lodash isNil call instead