Here's the output in the console:

====================================================

QCAD version 3.27.8
12:34:54: Debug: loading plugins...
12:34:54: Debug: loading static plugins...
12:34:55: Debug: trying to load theme stylesheet: themes/Default/stylesheet.css
12:34:55: Debug: trying to load theme stylesheet: themes/Default/stylesheet_linux.css
12:34:56: Debug: CadToolBar.initStyle
12:34:56: Debug: EcmaScriptShell.initStyle:
12:34:57: Debug: loading plugins...
12:34:57: Debug: loading static plugins...
Warning: action not found: "VisibleInCadToolBar"
Warning: action not found: "VisibleInMatrixPanel"
Warning: action not found: "VisibleInMenu"
Warning: action not found: "VisibleInToolBar"
Warning: action not found: "VisibleInUserToolBar1"
Warning: action not found: "VisibleInUserToolBar2"
12:35:00: Debug: checking for QCAD Pro updates...
Warning: QSslSocket: cannot resolve SSL_set_psk_client_callback
Warning: QSslSocket: cannot resolve SSL_set_psk_server_callback
Warning: QSslSocket: cannot resolve SSL_CTX_use_psk_identity_hint
Warning: QSslSocket: cannot resolve SSLv2_client_method
Warning: QSslSocket: cannot resolve SSLv3_client_method
Warning: QSslSocket: cannot resolve SSLv2_server_method
Warning: QSslSocket: cannot resolve SSLv3_server_method
Auto configuration failed
140619518608640:error:0EFFF065:configuration file routines:CRYPTO_internal:missing equal sign:conf/conf_def.c:346:line 24
Warning: QMutex: destroying locked mutex

QCAD has unexpectedly quit.

Please use the offscreen or minimal platform plugin for headless systems
(without a running X11 server):
./qcad -platform offscreen

In addition, you might have to override the default Qt style
to prevent the loading of a native desktop style (such as GTK):
./qcad -style plastique

==================================================

Here are my system's specs:

Operating System: openSUSE Tumbleweed 20221113
KDE Plasma Version: 5.26.3
KDE Frameworks Version: 5.99.0
Qt Version: 5.15.7
Kernel Version: 6.0.8-1-default (64-bit)
Graphics Platform: X11
Processors: 4 × AMD Phenom(tm) II X4 910e Processor
Memory: 7.5 GiB of RAM
Graphics Processor: AMD RS880