Client can't connect to hotspot login page

I have setup a hotspot on 2 MicroTiks, one works great. The other (which I thought I set up the same), does not. To create the most simple of tests, I have a single client (172.31.236.247) connect to the hotspot and open a browser and enter the IP of the mikrotik (HTTP://172.31.236.1). The attempt to view the page times out. I tried to capture traffic by logging any packet to/from 172.31.236.247 (top of the input and top of the output chain) on the mikrotik:

Or at this URL (in case image doesn’t show) https://postimg.cc/BLJCGZCy

Yet on the client browser times out, “This site can’t be reached. 172.31.236.1 took too long to respond”

In case it helps attempts to ping the mikrotik (172.31.236.1 ) from the client (172.31.236.247) fail as “destination net unreachable”, yet sent=4 received=4. And the packets appear in/out the mikrotik log:

Or at this URL (in case image doesn’t show) https://postimg.cc/CRNGsp0s

But this may be normal for an unauthenticated hotspot user. Can anyone explain why the client & mikrotik can’t communicate for browsing to the login page on the portal? My hotspot config is pretty simply:

[admin@firewall-k] > /ip hotspot print 
Columns: NAME, INTERFACE, ADDRESS-POOL, PROFILE, IDLE-TIMEOUT
# NAME                INTERFACE         ADDRESS-POOL     PROFILE             IDLE-TIMEOUT
0 siteb Hotspot  vlan40-guestwifi  Guest Wifi Pool  siteb-profile  5m          

[admin@firewall-k] > /ip hotspot profile print
Flags: * - default 
 0 * name="default" hotspot-address=0.0.0.0 dns-name="" html-directory=hotspot html-directory-override="" rate-limit="" http-proxy=0.0.0.0:0 
     smtp-server=0.0.0.0 login-by=cookie,http-chap http-cookie-lifetime=3d split-user-domain=no use-radius=no 

 1   name="siteb-profile" hotspot-address=172.31.236.1 dns-name="hotspot-k.mydomain.ca" html-directory=hotspot html-directory-override="" 
     rate-limit="" http-proxy=0.0.0.0:0 smtp-server=0.0.0.0 login-by=cookie,http-chap,https,http-pap http-cookie-lifetime=3d ssl-certificate=none 
     https-redirect=no split-user-domain=no use-radius=no

I am using HTTP to view the login page, not HTTPS

I have the same problem on 7.11 firmware. 6.49 works fine. Maybe anybody knows anything about it?

have the same problem on 7.11 firmware

My problem was in arp setting in bridge configuration. It must be proxy-arp.