Hello @erasg
What is the error message returns from the API? Can you replicate the issue on RKD API Page https://support-portal.rkd.refinitiv.com/SupportSite/TestApi/Op?svc=TokenManagement_1&op=CreateServiceToken_1 ?
Please note that the developer Q&A forum is for the API general usage question, you can contact the RKD support team directly for the usage issue via https://my.refinitiv.com/content/mytr/en/productsupport.html website.