Can you ask him to reinstall ecatcher and make sure he restarts his pc? I am not sure what would be going on here if there is no firewall blocking it. the logs only show the VPN not being established. Some thing could be corrupt with the install or the tap adapter.
Is the Talk2m service running?
8-26T13:29:21,778 INFO - ConnectionWorkerErrorStatus : VPN tunnel error: - 1
2021-08-26T13:29:22,783 INFO - ConnectionWorkerProgressStatus : Connecting Talk2M: Requesting Talk2M server informations… - 5 %
2021-08-26T13:29:23,809 INFO - Best endPoint choosen: UDP on client.vpn43.talk2m.com(22.214.171.124):1194
2021-08-26T13:29:23,810 WARN - start client.vpn43.talk2m.com 1194 “C:\Users\w30svtrn\AppData\Roaming.talk2M\temp\62507614-7ba6-40f8-8e28-7b70e634be48” tap UDP netsh
2021-08-26T13:29:23,814 WARN - OK
2021-08-26T13:29:23,855 INFO - ConnectionWorkerProgressStatus : Connecting Talk2M: Opening VPN tunnel… - 20 %
2021-08-26T13:29:45,980 INFO - logout
2021-08-26T13:29:45,980 WARN - shutdown
2021-08-26T13:29:45,980 ERROR - Start connection worker canceled : null
2021-08-26T13:29:45,981 ERROR - Start connection worker canceled : null
2021-08-26T13:29:45,982 ERROR - Cancel : true
2021-08-26T13:29:46,020 WARN - OK
2021-08-26T13:29:46,023 WARN - shutdown
2021-08-26T13:29:46,024 WARN - OK
2021-08-26T13:29:46,023 WARN - StartConnectionWorker cannot establish vpn tunnel.