Link account extension improvement

I have forked the auth0 account link extension to allow to configure custom domains through rules config instead of by editing the source code of it

Everything is working fine except that I am not able anymore to access the config of this extension to edit the theme of it through the auth0 interface after a refresh of the page. On the page that lists all installed extensions (see all-extensions.har file), I don’t have the ‘setting’ icon for the extension and when I click on the name of the extension, I have a new tab that open on my browser that end with a 504 status.

how can I find where come from this bug?