Thank you, I spent several hours trying to figure this out before finding your comment.
Mine is a little different from the answer above, I needed two entries after connect-src,
and I also added a font-src.
Header always set Content-Security-Policy "default-src 'self'; script-src
'self' 'unsafe-eval' 'unsafe-inline'; style-src 'self'
'unsafe-inline'; img-src 'self' data:; font-src 'self' data:;
connect-src 'self' wss:/<engine-fqdn>:6100"
This was for OLVM Version 4.5.5-1.22.el8.