file widget returns 'must be string' for @rjsf/daisyui on submit

[himelpdas]

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?

daisyui

Version

6.0.0-beta.21

Current Behavior

with @rjsf/daisyui, when trying to use file widget as described in the wiki

https://rjsf-team.github.io/react-jsonschema-form/docs/usage/widgets#file-widgets

I get an error ''must be string"

Expected Behavior

This issue does not appear when using @rjsf/core. I get the expected results and am able to process the b64 encoded file in the submit handler.

Steps To Reproduce

1. import { Form } from '@rjsf/daisyui'
2. create a simple file widget like so https://rjsf-team.github.io/react-jsonschema-form/docs/usage/widgets#file-widgets
3. try to submit a file
4. get error 'must be string'

Environment

- OS: Ubuntu 25.04
- Node: 24.8.0
- pnpm: 10.17.0
- daisyui: 5.1.18

Anything else?

No response

[heath-freenome]

@inchoate Are you able to provide a fix for this?