build failed

[purva030399]

Hello
I am trying to execute a code and the following error is showing up. Please help.
[2913/3434] Compiling src/ndnSIM/examples/ndn-custom-apps/hijacker.cpp
../src/ndnSIM/examples/mob9.cpp: In function ‘int ns3::main(int, char**)’:
../src/ndnSIM/examples/mob9.cpp:68:20: error: cannot convert ‘ns3::WifiPhyStandard’ to ‘ns3::WifiStandard’
68 | wifi.SetStandard(WIFI_PHY_STANDARD_80211a);
| ^~~~~~~~~~~~~~~~~~~~~~~~
| |
| ns3::WifiPhyStandard
In file included from ./ns3/spectrum-wifi-helper.h:24,
from ./ns3/wifi-module.h:89,
from ../src/ndnSIM/examples/mob9.cpp:23:
./ns3/wifi-helper.h:475:42: note: initializing argument 1 of ‘virtual void ns3::WifiHelper::SetStandard(ns3::WifiStandard)’
475 | virtual void SetStandard (WifiStandard standard);
| ~~~~~~~~~~~~~^~~~~~~~
../src/ndnSIM/examples/mob9.cpp:78:56: error: ‘Default’ is not a member of ‘ns3::YansWifiPhyHelper’
78 | YansWifiPhyHelper wifiPhyHelper = YansWifiPhyHelper::Default();
| ^~~~~~~

Waf: Leaving directory `/home/purvap/Desktop/ndnSIM/ns-3/build'
Build failed
-> task in 'mob9' failed with exit status 1 (run with -v to display more information)