3CX-Bitrix CRM Integration stopped working

[hyperborea]

Hello,
I have 3CX installed in my on-premise environment Version 18.0 (Build 965). Since 3 weeks ago i can't retrieve data from Bitrix on-premise environment.
I have CRM integration with bitrix.
The problem is not in Bitrix, because i restored bitrix backup from 28.05.2022 and export data from Bitrix work.
In 3CX from settings/CRM integration/CRM Provider configuration TEST, every time I get a reply that the client is new and a new registration is being made in Bitrix.
I have not made any changes in Bitrix. What is may be a problem?
How I can make troubleshooting on this communication (3CX-Bitrix) and where is logs (if they can help me)?
Anyone to had problem like this, maybe after last update on 3cx?

 

[TheodorosG_3CX]

Are you using the Bitrix24 (cloud based) CRM as per guidelines:
• https://www.3cx.com/docs/bitrix24-crm-integration/

 

[zia.khan]

Hi,
How 3CX and Bitrix24 integration is working for you?

Thanks,
Zia