Hotspot login, internal error

Hello, some time ago we are having problems with the hotspot service.
Occasionally there is an internal error which causes users can not log in to it.
The error that is generated on the console when the hostpot user try login is:
“internal error: login failed: failed to grant access”
The version where the error occurs is the 5.X including 5.24
Please we need your help, since the solution is to reboot the board.
Regards

can please give complete snapshots of hotspot setup…

Hello, this is the hotspot setup of one router with the error. The authentication and rates limit is from freeradius.
Thanks
[admin@rb1000-sada] /ip hotspot> export

sep/25/2013 14:44:49 by RouterOS 5.24

software id = Q703-Y3X7

/ip hotspot profile
set [ find default=yes ] dns-name=“” hotspot-address=0.0.0.0 html-directory=hotspot http-cookie-lifetime=3d http-proxy=0.0.0.0:0
login-by=cookie,http-chap name=default rate-limit=“” smtp-server=0.0.0.0 split-user-domain=no use-radius=no
add dns-name=“” hotspot-address=172.17.24.1 html-directory=hotspot http-cookie-lifetime=3d http-proxy=0.0.0.0:0 login-by=
cookie,http-chap name=hsprof1 nas-port-type=wireless-802.11 radius-accounting=yes radius-default-domain=“” radius-interim-update=
received radius-location-id=“” radius-location-name=“” radius-mac-format=XX:XX:XX:XX:XX:XX rate-limit=“” smtp-server=0.0.0.0
split-user-domain=no use-radius=yes
/ip hotspot
add address-pool=dhcp_pool2 addresses-per-mac=2 disabled=no idle-timeout=5m interface=hotspot keepalive-timeout=none name=hotspot1
profile=hsprof1
/ip hotspot user profile
set [ find default=yes ] address-pool=publico idle-timeout=none keepalive-timeout=2m name=default shared-users=1 status-autorefresh=1m
transparent-proxy=no
add idle-timeout=none keepalive-timeout=2m name=framed shared-users=1 status-autorefresh=1m transparent-proxy=no
/ip hotspot service-port
set ftp disabled=no ports=21
/ip hotspot walled-garden ip
add action=accept disabled=no dst-address=192.168.3.0/28 dst-port=53 protocol=udp
add action=accept disabled=no dst-address=192.168.3.0/28 dst-port=53 protocol=tcp

Hello,

facing the similar kind of issue with my setup as well in latest Router OS version.