Hi there,
I setup a server GTAV FiveM on a linux OS with mono.
All work perfectly but when i try to connect to the server i get this type of error :
The server is a debian 8
Version of mono :
Mono JIT compiler version 4.6.0 (Stable 4.6.0.125/753c323 Sun 23 Apr 20:03:13 CEST 2017)
TLS: __thread
SIGSEGV: altstack
Notifications: epoll
Architecture: amd64
Disabled: none
Misc: softdebug
LLVM: supported, not enabled.
GC: sgen
I tried to find an other topic or on google but i wasn’t to find something clear, i look to see if the firewall block the data but the server received the packet.
Thanks for your help
Try sudo mozroots --import --sync
.
Thanks @dubnium for a quick answer. 
I did it :
Mozilla Roots Importer - version 4.6.0.0
Download and import trusted root certificates from Mozilla’s MXR.
Copyright 2002, 2003 Motus Technologies. Copyright 2004-2008 Novell. BSD licensed.
WARNING: mozroots is deprecated, please move to cert-sync instead.
Downloading from ‘https://hg.mozilla.org/releases/mozilla-release/raw-file/default/security/nss/lib/ckfw/builtins/certdata.txt’…
Importing certificates into user store…
1 new root certificates were added to your trust store.
Import process completed.
EDIT :
Thanks @dubnium, it works !
Have a good day !
Salut Michou comment a tu fais ? Merci 
merci bb
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Salut @Denisbart619,
Comme l’a dit l’administrateur dubnium, il te suffit de faire la commande indiquer plus haut.
Cordialement Michou
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Je l’ai fais toujours le même soucis.