Im sending POST query to https://accounts.zoho.com/oauth/v2/token like this described in https://www.zoho.com/crm/help/api/v2/#generate-access article, but got error {"error":"invalid_client"}. Im first thinking that this my mistake, but after this I compare client_id that I send with client_id on https://accounts.zoho.com/developerconsole and they absolutely consice. Besides, If I send wrong client_id why ZohoCRM give me generate grant token (where client_id is need too) and dont give me errors?

I found topic on this forum this problem like this (https://help.zoho.com/portal/community/topic/error-invalid-client-api-v2), but I register in .com zone, create client connection in .com zone and use API in .com zone

What I do wrong?