Red Hat CERTIFICATE SYSTEM 8.0 - ADMINISTRATION Admin Manual page 222

Chapter 7. Using the Online Certificate Status Protocol Responder
11. Edit the /var/lib/pki-ocsp/conf/context.xml, changing the following line:
<Context>
to
<Context crossContext="true" >
12. Edit the /var/lib/pki-ocsp/webapps/ocsp2/services.template file and change the
following line:
result.recordSet[i].uri);
to
result.recordSet[i].uri + "/");
13. Start the OCSP instance. For example:
service pki-ocsp start
200