Jitsi-meet server returns a blank page

Is jitsi-meet a server or client? Not clear about the terminology. Jitsi-meet for android appears to be a client, but jitsi-meet for linux appear to be both client (jitsi-meet?) and server (videobridge?).

Installed jitsi-meet in linux according to instructions in github. Works as expected except web page appears to be blank (dark grey). The page source is 463 lines, so something is being served.

What am I doing wrong? (And what should I do to fix it?)

Problem was new version of Apache . . . fixed!