Cannot read preview's environment variable in pages

[psypony.dev]

For Workes & Pages, what is the name of the domain?

preview.psypony.pages.dev

What is the error number?

none

What is the error message?

no error message.

What is the issue or error you’re encountering

Cannot read preview’s environment variable in pages. always returned production’s environment values.

What steps have you taken to resolve the issue?

I have no solutions.

What are the steps to reproduce the issue?

visit our pages.

Screenshot of the error

[psypony.dev]

I’m developing with react.js and using vite.

alert(‘VITE_NODE_ENV:’ + import.meta.env.VITE_NODE_ENV);

When I run the code, the environment variable values ​​set in preview are not displayed, but the environment variable values ​​set in production are displayed.

[psypony.dev]

solved. my mistake at vite build.