Does not start on Manjaro Cinnamon

[D1Ck3n]

Good day,

i tried the snap but non of the apps starts. The icon appears in my Dock but it does not start :(

my system:
OS: Manjaro Linux x86_64
Host: MS-7C02 1.0
Kernel: 5.6.16-1-MANJARO
Uptime: 1 hour, 33 mins
Packages: 1772 (pacman), 4 (snap)
Shell: bash 5.0.17
Resolution: 1920x1080, 1920x1080
DE: Cinnamon
WM: Mutter (Muffin)
WM Theme: Mint-Y-Dark-Teal (Mint-Y-Dark)
Theme: Mint-Y-Dark-Teal [GTK2/3]
Icons: Papirus-Adapta-Nokto-Maia [GTK2/3]
Terminal: gnome-terminal
CPU: AMD Ryzen 5 2600X (12) @ 4.022GHz
GPU: NVIDIA GeForce GTX 1060 6GB
GPU: AMD ATI Radeon RX 470/480/570/570X/580/580X
Memory: 5602MiB / 15959MiB

terrminal output:
[merlin@MT-PC ~]$ unofficial-webapp-office.excel
Qt: Session management error: None of the authentication protocols specified are supported
"/home/merlin/Excel" does not exist.
[19719:19719:0701/102642.476887:FATAL:credentials.cc(155)] Check failed: NamespaceUtils::DenySetgroups(). : Permission denied
#0 0x7f250ab97aee
#1 0x7f250abaa0e2
#2 0x7f250abab45c
#3 0x7f250b71fb21
#4 0x7f250b7202dd
#5 0x7f250a7b4527
#6 0x7f250a45fd48
#7 0x7f250a463262
#8 0x7f250a251a9b
#9 0x7f250a252bd5
#10 0x7f250a1e74f1 QtWebEngineCore::BrowserContextAdapter::defaultContext()
#11 0x7f2514dc83b5 QQuickWebEngineProfile::defaultProfile()
#12 0x7f2514dcfdba QQuickWebEngineViewPrivate::QQuickWebEngineViewPrivate()
#13 0x7f2514dd0c9b QQuickWebEngineView::QQuickWebEngineView()
#14 0x7f251500827b
#15 0x7f252a7cc962 QQmlType::create()
#16 0x7f252a83d146 QQmlObjectCreator::createInstance()
#17 0x7f252a83f3da QQmlObjectCreator::setPropertyBinding()
#18 0x7f252a83fe11 QQmlObjectCreator::setupBindings()
#19 0x7f252a83cba6 QQmlObjectCreator::populateInstance()
#20 0x7f252a83d97c QQmlObjectCreator::createInstance()
#21 0x7f252a840c6c QQmlObjectCreator::create()
#22 0x7f252a7b7408 QQmlComponentPrivate::beginCreate()
#23 0x7f252a7b574f QQmlComponent::create()
#24 0x563d63801c5a
#25 0x7f2528375b97 __libc_start_main
#26 0x563d63803ada

Fontconfig warning: FcPattern object weight does not accept value [40 210)
Memory access error (memory dump written)

[nicxxx]

Unfortunately I have exactly the same error on Manjaro.

[gmllt]

Deleting fontconfig cache seems to resolve the problem :

sudo rm /var/cache/fontconfig/*
rm ~/.cache/fontconfig/*

Solution found here : https://forum.snapcraft.io/t/snapped-app-not-loading-fonts-on-fedora-and-arch/12484/23