Building on Linux 5.15.0-67-generic #74-Ubuntu SMP with QT version 5.15.3 encountered this error when building from source:

/usr/bin/ld: CMakeFiles/hedgewars.dir/util/FileEngine.cpp.o:(.data.rel.ro._ZTV10FileEngine[_ZTV10FileEngine]+0x20): undefined reference to `QAbstractFileEngine::open(QFlags, std::optional >)'
/usr/bin/ld: CMakeFiles/hedgewars.dir/util/FileEngine.cpp.o:(.data.rel.ro._ZTV10FileEngine[_ZTV10FileEngine]+0x88): undefined reference to `QAbstractFileEngine::mkdir(QString const&, bool, std::optional >) const'
collect2: error: ld returned 1 exit status
make[2]: *** [QTfrontend/CMakeFiles/hedgewars.dir/build.make:3745: bin/hedgewars] Error 1
make[1]: *** [CMakeFiles/Makefile2:2649: QTfrontend/CMakeFiles/hedgewars.dir/all] Error 2
make: *** [Makefile:166: all] Error 2

Stuck on nov 19th

Is possible to play cross platform between computer and mobile

Hello,
I tried once to connect with an unregistered nick wich seems to be illegal because of some characters.
Now I can't change back the nick, each time I try to connect I get the illegal nickname message.
How can I fix that?

I tried to force the nick value in settings.ini, but when I retry to connect, the illegal nick come back.

edit: I can join again, but I did not understand how.

Hello!
I recently got a friend to install Hedgewars and tell me what he thought. He made and account, downloaded everything, and tried it out. He began with the tutorial levels, and noticed that the game got progressively slower as he went on (in terms of lag). however, once he got to the bazooka level, he would fire, and the projectile would move very slowly, then ten seconds later, it would fly at mach speed. After firing several times, the game simply froze and became unplayable.he checked the task manager, and it reported nothing out of the ordinary, he turned off hid anti virus, nothing changed, and turned off auto update for anything running in the background, still no change. He has plenty of space on his pc, so I was wondering if anyone else has run into similar problems, and how one could go about fixing it.
Thanks!