[ovirt-users] Adding ISO doesn't work

I have a problem adding ISO. Fresh installation of OracleLinux-R8-U10 with Ovirt Version:4.5.5-1.22.el8 installed on it. I've already gone through all possible forums and threads with a similar problem, but none of them have been solved, and I haven't been able to solve the ISO problem either. Engine is installed as a virtual machine on VMware and manages two KVM hosts (also a fresh install). I replaced the certificates for the test, but it didn't help and I went back to the old configuration. I keep getting a certificate error when running the test, even though I added it to the browser. I tested on different browsers. "Connection to ovirt-imageio service has failed. Ensure that ovirt-engine certificate is registered as a valid CA in the browser." Can I get help here?