# Pastebin 0KW7cab9
Hi.
I have installed many services from OpenStack using Kolla-ansible but only the Mistral service is facing this error, please help:

Error: Unable to restore workflow: HTTPSConnectionPool(host='internal-kollaprx.abad.com', port=8989): Exceeded maximum retries with URL: /v2/workflows (caused by SSLError(SSLCertVerificationError(1, '[SSL:VERIFYFA Certificate' self-signed certificate in certificate chain (_ssl.c:1007)'))) Details

HTTPSConnectionPool(host='internal-kollaprx.abad.com', port=8989): Exceeded maximum retries with url: /v2/flows (caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_VERIFY_FAILED certificate failed to verify in certificates (_ssl.c:1007)')))