Packaged ApplicationManager cannot start a simple UI

/home/gagi/Qt/5.15.10/gcc_64/bin/appman main.qml                                                                                            ⏎
[WARN | am.deployment] No --installation-dir command line parameter or applications/installationDir configuration key specified. It won't be possible to install, remove or access installable packages.[configuration.cpp:403]
[INFO | am.system] NOTICE: running on private D-Bus session bus to avoid conflicts:                                                                                                                        [dbusdaemon.cpp:111]
[INFO | am.system]         DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-aIrDNrcbEK,guid=1208952461472820d25af0446305e591                                                                               [dbusdaemon.cpp:112]
[FATL | default] Cannot mix incompatible Qt library (5.15.2) with this library (5.15.10)

*** process /home/gagi/Qt/5.15.10/gcc_64/bin/appman (415104) crashed ***

 > why: uncaught signal 6 (Aborted)

 > where: main thread, TID: 415104, pthread ID: 7fa4a432d840

 > Your binary is built in release mode. The following backtrace might be inaccurate.
 > Please consider using a debug build for a more accurate backtrace.

 > C++ backtrace:
   1: /home/gagi/Qt/5.15.10/gcc_64/bin/appman() [0x578dc1]
   2: /home/gagi/Qt/5.15.10/gcc_64/bin/appman() [0x578f14]
   3: /home/gagi/Qt/5.15.10/gcc_64/bin/appman() [0x57743b]
   4: /lib/x86_64-linux-gnu/libpthread.so.0 [13200]
   5: gsignal [141]
   6: abort [112]
   7: qErrnoWarning(char const*, ...)
   8: /home/gagi/Qt/5.15.10/gcc_64/bin/../lib/libQt5Core.so.5 [2ca38d]
   9: QWaylandCompositorPrivate::QWaylandCompositorPrivate(QWaylandCompositor*) [35]
  10: QWaylandQuickCompositor::QWaylandQuickCompositor(QObject*) [28]
  11: /home/gagi/Qt/5.15.10/gcc_64/bin/appman() [0x48b934]
  12: /home/gagi/Qt/5.15.10/gcc_64/bin/appman() [0x48013a]
  13: /home/gagi/Qt/5.15.10/gcc_64/bin/appman() [0x48053f]
  14: QCoreApplicationPrivate::sendThroughApplicationEventFilters(QObject*, QEvent*) [88]
  15: QCoreApplicationPrivate::notify_helper(QObject*, QEvent*) [8b]
  16: QCoreApplication::notifyInternal2(QObject*, QEvent*) [108]
  17: QWindowPrivate::create(bool, unsigned long long) [3a2]
  18: QWindowPrivate::setVisible(bool) [bf]
  19: /home/gagi/Qt/5.15.10/gcc_64/bin/appman() [0x42fc7c]
  20: /home/gagi/Qt/5.15.10/gcc_64/bin/appman() [0x428ea1]
  21: __libc_start_main [cd]
  22: /home/gagi/Qt/5.15.10/gcc_64/bin/appman() [0x429f9e]

 > QML backtrace: empty

 > the process will be aborted (core dumped)

[1]    415104 IOT instruction (core dumped)  /home/gagi/Qt/5.15.10/gcc_64/bin/appman main.qml