Happens once a night. I already reinstalled voobly.
Log Name: Application
Source: Application Error
Date: 1/4/2021 5:55:21 AM
Event ID: 1000
Task Category: (100)
Level: Error
Keywords: Classic
User: N/A
Computer: DESKTOP-VI30SUC
Description:
Faulting application name: voobly.exe, version: 0.1.1.1262, time stamp: 0x5ec97df1
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x00468004
Faulting process id: 0x37ac
Faulting application start time: 0x01d6e272626e1373
Faulting application path: C:\Program Files (x86)\Voobly\voobly.exe
Faulting module path: unknown
Report Id: a1e7a566-7f2a-4d69-b8ac-576fc70cb6f1
Faulting package full name:
Faulting package-relative application ID:
Event Xml:
<Event xmlns="[You must login to view link]">
<System>
<Provider Name="Application Error" />
<EventID Qualifiers="0">1000</EventID>
<Level>2</Level>
<Task>100</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2021-01-04T11:55:21.207626500Z" />
<EventRecordID>85497</EventRecordID>
<Channel>Application</Channel>
<Computer>DESKTOP-VI30SUC</Computer>
<Security />
</System>
<EventData>
<Data>voobly.exe</Data>
<Data>0.1.1.1262</Data>
<Data>5ec97df1</Data>
<Data>unknown</Data>
<Data>0.0.0.0</Data>
<Data>00000000</Data>
<Data>c0000005</Data>
<Data>00468004</Data>
<Data>37ac</Data>
<Data>01d6e272626e1373</Data>
<Data>C:\Program Files (x86)\Voobly\voobly.exe</Data>
<Data>unknown</Data>
<Data>a1e7a566-7f2a-4d69-b8ac-576fc70cb6f1</Data>
<Data>
</Data>
<Data>
</Data>
</EventData>
</Event>

Happens during the game then i lose.

The log you posted above shows an application crash. It does not however say anything about what caused the crash.

I would advise starting with a clean voobly install. Please follow the steps mentioned here to perform a clean installation of the Voobly client
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If that does not work, and the crash happens mid-game, start with a clean reinstallation of the game as well. Please follow the steps mentioned here to perform a clean installation of the game:
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Try to play the game in single player without any active mods (data or visual). That will help you narrow down the problem cause.

Finally, to rule out any application conflict on your system, close and exit all running applications (including background apps from your system tray that are not needed actively while playing the game).

Good luck.