Solved 3cx windows client crashes when i tried to make a phone call

[Manos Val]

I have problem with a laptop (windows 10 pro) to makes phone call via 3cx application (ver 16.3.0.11). When I click to a number to make a phone call or press call button from kay pad the key pad closes instantaneously.
I can not also answer a call, the 3cx application freezes when i press answer button.
I checked windows event viewer and i found the following:

The program 3CXWin8Phone.exe version 16.3.0.111 stopped interacting with Windows and was closed. To see if more information about the problem is available, check the problem history in the Security and Maintenance control panel.
Process ID: 940
Start Time: 01d61fa9c9e68d24
Termination Time: 4294967295
Application Path: C:\ProgramData\3CXPhone for Windows\PhoneApp\3CXWin8Phone.exe
Report Id: 33c512ed-3764-4124-9150-a56a1bc40b84
Faulting package full name:
Faulting package-relative application ID:
Hang type: Top level window is idle
---------------------------------------------
Fault bucket , type 0
Event Name: AppHangB1
Response: Not available
Cab Id: 0

Problem signature:
P1: 3CXWin8Phone.exe
P2: 16.3.0.111
P3: 5e85a5b9
P4: abde
P5: 67246080
P6:
P7:
P8:
P9:
P10:

Attached files:

These files may be available here:
\\?\C:\ProgramData\Microsoft\Windows\WER\ReportQueue\Critical_3CXWin8Phone.exe_808fa688973940d8ee75c489a1778e37a2c3471_eeea52f0_b6c7aa83-1e29-480b-b93e-5fb4592c3a05

Analysis symbol:
Rechecking for solution: 0
Report Id: 33c512ed-3764-4124-9150-a56a1bc40b84
Report Status: 4
Hashed bucket:
Cab Guid: 0
---------------------------
I have put the same account to an other Windows 10 Pro laptop and works perfectly.
Any suggestion?

 

[Manos Val]

I found what was the problem. In privacy microphone settings --> Allow apps to access your microphone, the option was Off!