Hi, that request should usually return a 200 OK and not a 302 Found. I think the wizard will just not follow to the new URL. Could you please show the response headers of that request that you highlighted, specifically the Location header, which should show to what URL it's trying to forward you.
WIthout being too deep into Apache reverse proxy configurations, it also looks rather overcomplicated the above config? Can't you just forward everything under /elastic to the ES instance, and just forward everything else to Kibana?