API works on master server but not works on the test server

API works on master server but not works on the test server

Hello,

I am a developer, and I do API connection to Zoho CRM.
My problem is, that I am developing on test server, and I need to get Access token via API.
The code is runing on the real server fine, but the result of the same code on the test server return false; No error messsages, just FALSE;

After login to Zoho return this URL to my test server:
 --> return FALSE; Not return the normal result.

The same file on the real server works. Ther I get normal answer from Zoho server with access token.
I have no idea, why don't response Zoho any answer when I call it from test server.



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