Zoho integration unsuccessful

[sharjeel.wasi]

I followed the below mentioned guide. However, I am receiving the attached error when I try to authenticate.

https://www.3cx.com/docs/pbx-crm-integration-zoho/

3CX used for integration:
Product: 3CX Enterprise 16 SC
Version: 18.0 Update 8 (Built 917)
Install: Self Managed
OS: Debian

 

[edossantos]

From the error log, it seems that 3CX can't access accounts.zoho.com:
System.Net.Http.HttpRequestException: Resource temporarily unavailable (accounts.zoho.com:443)

Is your Zoho account located in this data center?