After login okta via saml, web page keep in "signing in to $web app name"

[SimonChou-17LIVE]

Hi, I am using okta SSO -saml2.0 in my stf, but I meet some situations,
it blocked us to use STF

What is the issue or idea you have?

1. Webpage status: After login okta via saml, web page keep in "signing in to $web app name" again and again

Do you see errors or warnings in the stf local output? If so, please paste them or the full log here.
stf logs show:
2021-10-12T06:36:26.467Z WRN/auth-saml2 16538 [*] Missing email in profile { issuer:
{ _: 'http://www.okta.com/exk43qcas7J6dWfTS696',
'$':
{ Format: 'urn:oasis:names:tc:SAML:2.0:nameid-format:entity',
'xmlns:saml2': 'urn:oasis:names:tc:SAML:2.0:assertion' } },
sessionIndex: '_de1281da468bd8d62272',
nameID: 'acertalk01@cool.fr.nf',
nameIDFormat: 'urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified',
nameQualifier: undefined,
spNameQualifier: undefined,
getAssertionXml: [Function] }

** expected behavior ""
After login in okta, web page can redirect to stf device list page

Please provide the steps to reproduce the issue.

1. Create saml app

2. Executed command: stf local --auth-type saml2
   --auth-options '[
   "--saml-id-provider-entry-point-url","https://cool-frstfttt.okta.com/app/cool-frstfttt_openstftest_1/exk43qcas7J6dWfTS696/sso/saml",
   "--saml-id-provider-issuer","http://www.okta.com/exk43qcas7J6dWfTS696",
   "--saml-id-provider-callback-url","http://localhost:7100/auth/saml/callback"
   ]'

My workspace environment
Mac OS Big sur

[SimonChou-17LIVE]

Hi all,
I solved my issue, my solution is
chagned "Name ID Format" to "EmailAddress" and
add "email" which value is "user.email" to "ATTRIBUTE STATEMENTS"