Hi @Ehtved,
Thanks for reaching out to the Auth0 Community!
The correct way to do so is to set issue_opaque_access_tokens: false in migrations as you have already done so. With that said, I can confirm that modifying the issue_opaque_access_tokens is the correct way to change the Fixed Length of Access Token & Authorization Code in your tenant settings. Everything looks good here.
However, I noticed that your picture_url and support_email properties in the tenant object have more than one value and are minimized.
Generally, the picture_url and support_email properties can only contain one value and are of type string. In this case, you will have to adjust your code to follow the expected syntax.
For example:
tenant:
default_audience: ''
default_directory: Username-Password-Authentication
enabled_locales:
- en
flags:
change_pwd_flow_v1: false
new_universal_login_experience_enabled: true
universal_login: true
revoke_refresh_token_grant: false
disable_clickjack_protection_headers: false
picture_url: https://SOME_PIC.URL
support_email: support@example.com
support_url: ''
If the issue persists, could you please share your complete import logs?
Thank you.