Genie Deployment on linux

Hi everyone, I have cretaed one webservice using Genie. Now I am trying to deploy the same on linux server, its not working good.
I have opened the required port on linux firewall( 19020 is what I am using). And I am trying to pass public IP address .
When I ran up(,host="my-public-ip",async=false). It is throwing below error.

┌ Info:
└ Web Server starting at http://22.14.3000.500:19020 - press Ctrl/Cmd+C to stop the server.
ERROR: cannot bind to port; may already be in use or access denied
Stacktrace:
[1] error(s::String)
@ Base ./error.jl:33
[2] #listen#10
@ /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/Sockets/src/Sockets.jl:624 [inlined]
[3] listen
@ /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.6/Sockets/src/Sockets.jl:623 [inlined]
[4] listen(f::Genie.Server.var"#7#14"{Int64}, host::Sockets.IPv4, port::Int64; sslconfig::Nothing, tcpisvalid::Function, server::Nothing, reuseaddr::Bool, max_connections::Int64, connection_count::Base.RefValue{Int64}, rate_limit::Nothing, reuse_limit::Int64, readtimeout::Int64, verbose::Bool, access_log::Nothing, on_shutdown::Nothing)
@ HTTP.Servers ~/.julia/packages/HTTP/aTjcj/src/Servers.jl:266
5()
@ Genie.Server ~/.julia/packages/Genie/E8mZc/src/Server.jl:110
[6] up(port::Int64, host::String; ws_port::Int64, async::Bool, verbose::Bool, ratelimit::Nothing, server::Nothing, wsserver::Nothing, open_browser::Bool, reuseaddr::Bool, http_kwargs::Base.Iterators.Pairs{Union{}, Union{}, Tuple{}, NamedTuple{(), Tuple{}}})
@ Genie.Server ~/.julia/packages/Genie/E8mZc/src/Server.jl:134
[7] #up#17
@ ~/.julia/packages/Genie/E8mZc/src/Server.jl:154 [inlined]
[8] top-level scope

I ahve tried disabling firewall also but its not working. I have tried running Genie server directly and through docker deployment also , in both casesd its throwing same error. Tried on RHEL 8.2 and Centos 8.0 server.