To reproduce:
cd technology/java-activemq-quarkus
./run.sh
Wait for website to show up on localhost:8080
Click solve button
Wait well beyond 10 seconds. I waited 3 minutes.
Still no solution.

Refreshing the page after 5 minutes makes no difference.

My console output:

... java-activemq-quarkus]$ ./run.sh 
Running the ActiveMQ broker via docker.
Running the solver.
Running the client.
Waiting up to 60 seconds for http://localhost:8080 to become available.
Application available at http://localhost:8080
Press [Ctrl+C] to exit.