From ./project/Dependencies.scala:

val jjwt = "io.jsonwebtoken" % "jjwt" % "0.9.1"

That library hasn't been updated since 2018. We should instead be using jjwt-api, jjwt-impl, and jjwt-jackson. The latest version is 0.11.1

For more details, see https://github.com/jwtk/jjwt#maven