When I try to set values for my custom defined prompt variables in playground.

I get "An unknown error occurred".

The console shows this error: _app-b31147928341cb50.js:26 Error: Minified React error #185; visit https://react.dev/errors/185 for the full message or use the non-minified dev environment for full errors and additional helpful warnings.

at n5 (framework-cc3284377ba1fbb8.js:1:29984)

at n2 (framework-cc3284377ba1fbb8.js:1:29523)

at ly (framework-cc3284377ba1fbb8.js:1:52716)

at lg (framework-cc3284377ba1fbb8.js:1:52332)