Cannot use the astro:config module without enabling the experimental feature.

:::caution[Deprecated]This error is from an older version of Astro and is no longer in use. If you are unable to upgrade your project to a more recent version, then you can consult unmaintained snapshots of older documentation for assistance.:::

CantUseAstroConfigModuleError: Cannot import the module "MODULE_NAME" because the experimental feature is disabled. Enable experimental.serializeConfig in your astro.config.mjs

What went wrong?

Cannot use the module astro:config without enabling the experimental feature.