CRM API Sandbox not working, being redirected

CRM API Sandbox not working, being redirected

Hello! So I am trying to upsert or insert a new record on the url https://www.zohoapis.eu/crm/v2/blablabla/upsert and being redirected to https://crm.zoho.eu/crm/v2/blablabla/upsert. What's going wrong here? There is no 302 in the documentation. Also the record was not inserted. No error given. Two weeks ago it worked just fine.