Not compatible with nextjs

[SHAGGYER]

When importing CustomDialog, I get an error. My code is:

const CustomDialogPromise = import("react-st-modal").then(
  (module) => module.CustomDialog
);

The error is:

SyntaxError: Cannot use import statement outside a module

[davedigi]

i have this problem too. But not in development, only in production.
in local production and in Vercel too