Here is what happens when I try to start the WhatPulse installed fron Snap (whatpulse-linux-2.9b2_amd64.snap)
$whatpulse
Gtk-Message: 03:38:50.179: Failed to load module "canberra-gtk-module"
Gtk-Message: 03:38:50.254: Failed to load module "colorreload-gtk-module"
11-12-2020 03:38:50.256 INFO "Starting WhatPulse 2.9-1915..."
QObject::startTimer: Timers cannot have negative intervals
11-12-2020 03:38:50.299 DEBUG Database file: "/home/madhead/snap/whatpulse/x1/.local/share/WhatPulse/whatpulse.db"
11-12-2020 03:38:50.307 DEBUG Database check: "ok"
11-12-2020 03:38:50.308 DEBUG Opened database in: 9 ms
11-12-2020 03:38:50.313 DEBUG Encrypted file: "/home/madhead/snap/whatpulse/x1/.local/share/WhatPulse/whatpulse.wpw"
11-12-2020 03:38:50.313 DEBUG Unable to open savefile
11-12-2020 03:38:50.313 WARN Failed to load ' "/home/madhead/snap/whatpulse/x1/.local/share/WhatPulse/whatpulse.wpw" ' - trying backup file
11-12-2020 03:38:50.313 DEBUG Unable to open savefile
11-12-2020 03:38:50.327 DEBUG Loaded application aliases
11-12-2020 03:38:50.327 WARN PF_PACKET is not available.
11-12-2020 03:38:50.363 WARN Cannot open lspci-command
Fontconfig warning: FcPattern object weight does not accept value [40 210)
Application crashed with signal 11!
0 [/snap/whatpulse/x1/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/../../../libQt5XcbQpa.so.5(+0xa0a11) [0x7fd16108fa11]]
1 [/snap/whatpulse/x1/usr/bin/../lib/x86_64-linux-gnu/libQt5Gui.so.5(+0x1d4b31) [0x7fd1684adb31]]
2 [/snap/whatpulse/x1/usr/bin/../lib/x86_64-linux-gnu/libQt5Gui.so.5(_ZN13QFontDatabase8findFontERK8QFontDefi+0x11d) [0x7fd1684b11ad]]
3 [/snap/whatpulse/x1/usr/bin/../lib/x86_64-linux-gnu/libQt5Gui.so.5(_ZN13QFontDatabase4loadEPK12QFontPrivatei+0x346) [0x7fd1684b19d6]]
4 [/snap/whatpulse/x1/usr/bin/../lib/x86_64-linux-gnu/libQt5Gui.so.5(_ZNK12QFontPrivate15engineForScriptEi+0xc3) [0x7fd168487433]]
5 [/snap/whatpulse/x1/usr/bin/../lib/x86_64-linux-gnu/libQt5Gui.so.5(_ZNK13QFontMetricsF7leadingEv+0x11) [0x7fd1684a8e11]]
6 [/snap/whatpulse/x1/usr/bin/../lib/x86_64-linux-gnu/libQt5Gui.so.5(+0x379fa8) [0x7fd168652fa8]]
7 [/snap/whatpulse/x1/usr/bin/../lib/x86_64-linux-gnu/libQt5Gui.so.5(+0x37ab10) [0x7fd168653b10]]
[1] 91852 abort (core dumped) whatpuls