OAuth provider plugin fetches callback instead of redirecting

Access to fetch at 'https://[OAuth Client URL]/api/auth/oauth2/callback/[provider-id]?code=jvP1PMidwLEQ7480CV1TdbpGqAlxo0tM&state=ztEd133q8cLtuUOyAFdb6BVPI1XpWmFf' (redirected from 'https://[OAuth Provider URL]/api/auth/sign-in/email') from origin '[OAuth Provider URL]' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

oauthProvider({
  disableJwtPlugin: true,
  loginPage: "/signin",
  consentPage: "/consent",
})

genericOAuth({
config: [
  {
    providerId: "[Provider ID]",
    clientId: process.env.[Client ID]!,
    clientSecret: process.env.[Client Secret]!,
    authorizationUrl: `${process.env.[OAuth Provider URL]}/api/auth/oauth2/authorize`,
    tokenUrl: `${process.env.[OAuth Provider URL]}/api/auth/oauth2/token`,
    userInfoUrl: `${process.env.[OAuth Provider URL]}/api/auth/oauth2/userinfo`,
    pkce: true
  }
]
})