Invalid JWS header,The algorithm "alg" header parameter must be for signatures

[Former user]

Hi, getting following exception Wat can be the reasons for the below exception and how to troubleshoot it ?

Caused by: java.text.ParseException: Invalid JWS header: The algorithm "alg" header parameter must be for signatures at com.nimbusds.jose.JWSObject.<init>(JWSObject.java:155) at com.nimbusds.jose.JWSObject.parse(JWSObject.java:421) at com.atlassian.jwt.core.reader.NimbusJwtReaderFactory$NimbusUnverifiedJwtReader.parseJWSObject(NimbusJwtReaderFactory.java:153)

[Yavor Vasilev]

What is the “alg” header value?

[Yavor Vasilev]

Closing for now, feel free to reopen if issue is confirmed.