If your firewall blocks access to the servers with which Solibri wants to communicate, you need to allow the traffic to the following addresses:
06832.tbnet1.com (port 443 and port 80) api.solibri.com (port 443) certificates.godaddy.com (port 80) crt.sectigo.com (port 80) crt.usertrust.com (port 443 and port 80) download.solibri.com (port 443) login.solibri.com (port 443) pool.ntp.org (UDP port 123) solution.solibri.com (port 443) ssc-api.solibri.com (port 443) ssl.solibri.com (port 443)