Tested apk , crashes
logcat
10-16 23:35:35.136 6511 6511 E AndroidRuntime: Process: com.plumedours.quizdepartements, PID: 6511 10-16 23:35:35.136 6511 6511 E AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.plumedours.quizdepartements/io.kodular.m_69mwell.QuizzDepartements.Screen2}: /tmp/1634414447797_0.23477283143716565-0/youngandroidproject/../src/io/kodular/m_69mwell/QuizzDepartements/Screen2.yail:1023:39: unbound location null
I see in logcat unbound location null so check Avoid Crashes of the Application for some of the components
Most probably About Title Screen is empty in other screens, if not check long list in topic