olsr: Terminating with "Bad Configuration" when selecting "6and4" (syntax error) for IPVersion

Im Using the "Freifunk Falter 1.2.3" (Freifunk Berlin) (OpenWRT 21.02) firmware with package olsr so i want to report the package problem upstream!

When Selecting "6and4" for "internet protocol":

olsrd is terminating with "Bad Configuration" in syslog... due to a syntax error in line XX...

root@FF-MH-BBD-305:~# /etc/init.d/olsrd stop
root@FF-MH-BBD-305:~# /etc/init.d/olsrd6 stop
Command failed: Not found
root@FF-MH-BBD-305:~# /usr/sbin/olsrd -f "/var/etc/olsrd.conf" -nofork

 *** olsr.org - pre-0.9.9-git_0000000-hash_91d5ae30edfe8ee23769434a3154dcd7 ***
 http://www.olsr.org

Parsing file: "/var/etc/olsrd.conf"
Debug level: 0
Noint set to 1
FIBMetric: flat
TC redundancy 2
NAT threshold 0.75
LQ Algorithm: etx_ff
Smart gateway system: enabled
Smart gateway threshold: 50
Pollrate 0.03
RtTable: 111
RtTableDefault: 112
RtTableTunnel: 113
RtTableTunnelPriority: 100000
RtTableDefaultOlsrPriority: 20000
Link quality level 2
OlsrPort: 698
Willingness: 3
Smart gateway uplink: ipv4
Smart gateway speed: 2500000 uplink/100000 downlink kbit/s
Config line 21: syntax error
Error while reading config file /var/etc/olsrd.conf!
Terminated
root@FF-MH-BBD-305:~#
root@FF-MH-BBD-305:~# cat /var/etc/olsrd.conf

DebugLevel 0
AllowNoInt yes
FIBMetric "flat"
TcRedundancy 2
NatThreshold 0.75
LinkQualityAlgorithm "etx_ff"
SmartGateway yes
SmartGatewayThreshold 50
Pollrate 0.025
RtTable 111
RtTableDefault 112
RtTableTunnel 113
RtTableTunnelPriority 100000
RtTableDefaultOlsrPriority 20000
LinkQualityLevel 2
OlsrPort 698
Willingness 3
SmartGatewayUplink "ipv4"
SmartGatewaySpeed 2500000 100000
IpVersion "6and4" <----------------------------------------------------------- error is here!

Hna4
{
                10.248.3.128 255.255.255.224
}
.....

When selecting "Ipv4":

root@FF-MH-BBD-305:~# /usr/sbin/olsrd -f "/var/etc/olsrd.conf" -nofork

 *** olsr.org - pre-0.9.9-git_0000000-hash_91d5ae30edfe8ee23769434a3154dcd7 ***
 http://www.olsr.org

Parsing file: "/var/etc/olsrd.conf"
Debug level: 0
Noint set to 1
FIBMetric: flat
TC redundancy 2
NAT threshold 0.75
LQ Algorithm: etx_ff
Smart gateway system: enabled
Smart gateway threshold: 50
Pollrate 0.03
RtTable: 111
RtTableDefault: 112
RtTableTunnel: 113
RtTableTunnelPriority: 100000
RtTableDefaultOlsrPriority: 20000
Link quality level 2
OlsrPort: 698
Willingness: 3
Smart gateway uplink: ipv4
Smart gateway speed: 2500000 uplink/100000 downlink kbit/s
HNA IPv4 entry: 10.248.3.128/255.255.255.224
Plugin: olsrd_txtinfo.so.1.1
Plugin param key:"accept" val: "0.0.0.0"
Plugin param key:"port" val: "2006"
Plugin: olsrd_arprefresh.so.0.1
Plugin: olsrd_nameservice.so.0.4
Plugin param key:"name" val: "FF-MH-BBD-305"
Plugin param key:"lat" val: "52.55770"
Plugin param key:"lon" val: "13.57454"
Plugin param key:"suffix" val: ".olsr"
Plugin param key:"hosts-file" val: "/tmp/hosts/olsr"
Plugin param key:"latlon-file" val: "/var/run/latlon.js"
Plugin param key:"services-file" val: "/var/etc/services.olsr"
Plugin: olsrd_jsoninfo.so.1.1
Plugin param key:"accept" val: "0.0.0.0"
Plugin: olsrd_dyn_gw.so.0.5
Plugin param key:"Ping" val: "46.182.19.48"
Plugin param key:"Ping" val: "80.67.169.40"
Plugin param key:"Ping" val: "194.150.168.168"
Plugin param key:"PingCmd" val: "ping -c 1 -q -I ffuplink %s"
Plugin param key:"PingInterval" val: "30"
        MID validity: 500.00
        TC interval: 2.00
        HNA validity: 125.00
        HELLO validity: 125.00
        TC validity: 500.00
        IPv4 broadcast: 255.255.255.255
        MID interval: 25.00
        HELLO interval: 3.00
        HNA interval: 10.00
        Mode: mesh

Interface Defaultssetting ifs_in_curr_cfg = 0
        Mode: mesh
setting ifs_in_curr_cfg = 0
        Mode: mesh
No policy rule for rt_table_pri
Choose priority 100010 for rt_table_default_pri
        IPv4 broadcast/multicast : 255.255.255.255
        Mode           : mesh (d)
        IPv6 multicast           : ff02::6d
        HELLO emission/validity  : 3.00 (d)/125.00 (d)
        TC emission/validity     : 2.00 (d)/500.00 (d)
        MID emission/validity    : 25.00 (d)/500.00 (d)
        HNA emission/validity    : 10.00 (d)/125.00 (d)
        Autodetect changes       : yes
        IPv4 broadcast/multicast : AUTO
        Mode           : mesh (d)
        IPv6 multicast           : ::
        HELLO emission/validity  : 0.00/0.00
        TC emission/validity     : 0.00/0.00
        MID emission/validity    : 0.00/0.00
        HNA emission/validity    : 0.00/0.00
        Autodetect changes       : no
        IPv4 broadcast/multicast : AUTO
        Mode           : mesh (d)
        IPv6 multicast           : ::
        HELLO emission/validity  : 0.00/0.00
        TC emission/validity     : 0.00/0.00
        MID emission/validity    : 0.00/0.00
        HNA emission/validity    : 0.00/0.00
        Autodetect changes       : no
OLSRD dyn_gw plugin ()
OLSRD jsoninfo plugin ()
OLSRD nameservice plugin ()
OLSRD arprefresh plugin ()
OLSRD txtinfo plugin ()
PING 46.182.19.48 (46.182.19.48): 56 data bytes

--- 46.182.19.48 ping statistics ---
1 packets transmitted, 1 packets received, 0% packet loss
round-trip min/avg/max = 35.720/35.720/35.720 ms

Start with the generated /var/etc/olsrd.conf and the /usr/sbin/olsrd entry point, comparing the failing IpVersion "6and4" configuration with the working IPv4 case. Check how /etc/init.d/olsrd produces this setting. Done means selecting "6and4" no longer causes a syntax error and olsrd starts successfully.