OIDC: this user can't understand how to generate sub claim

[Peter Schober]

* Francesco Malvezzi via users <users at shibboleth.net> [2022-08-29 14:40]:
>         <InputDataConnector ref="computedSubjectId" attributeNames="subjectId"/>
[...]
> According to the logs, the uid attribute is present and released.

At least in your post you have not provided evidence on the relation
of the 'uid' attribute (which you say is present) and the configured
InputDataConnector.
I'd imagine you're generating the "subjectId" attribute based off
'uid' somewhere/somehow but for me this is only an assumption.
I could also speculate that it could be this connection that's
missing/misconfigured.

HTH,
-peter