router pod showing error "Starting frontend public: cannot bind socket [0.0.0.0:80]"

Issue

Router pod fails to start with the error:

I0312 13:57:31.374856       1 template.go:246] Starting template router (v3.6.173.0.21)
I0312 13:57:31.596023       1 router.go:240] Router is including routes in all namespaces
E0312 13:57:31.864646       1 ratelimiter.go:52] error reloading router: exit status 1
[ALERT] 070/135731 (49) : Starting frontend public: cannot bind socket [0.0.0.0:80]