@tihomir I’m creating the newUntypedExternalWorkflowStub in the java activity.
Thanks for making the example. But, I still get the same error called from non workflow or workflow callback thread
"trace": "java.lang.Error: Called from non workflow or workflow callback thread\n\tat io.temporal.internal.sync.DeterministicRunnerImpl.currentThreadInternal(DeterministicRunnerImpl.java:135)\n\tSuppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: \nError has been observed at the following site(s):\n\t|_ checkpoint ⇢ springfox.boot.starter.autoconfigure.SwaggerUiWebFluxConfiguration$CustomWebFilter [DefaultWebFilterChain]\n\t|_ checkpoint ⇢ org.springframework.security.web.server.authorization.AuthorizationWebFilter [DefaultWebFilterChain]\n\t|_ checkpoint ⇢