Currently I am using django-polaris to build anchor for sep24 and Ngrok to create https server on localhost. But, the moment I try to add asset into stellar demo wallet, Having fetched the asset record successfully, it's showing network error.
First thing I see is you are trying to add the home-domain with the leading protocol (
https://…). You should only provide a domain instead a URL.
As asset-information is still fetched, I'd assume
Further the account (
GCU2YPT63CTAAV2MYHEVOTPFEVHQHJV7L3UYE4XBFEQSHAHUJQLWYV6W) is not funded (neither on testnet nor on public net - but this does not prevent demo-wallet from fetching asset-info.
Did you check, that the SEP-servers are actually reachable? The network error probably stems from the wallet not being able to resolve the toml, respectively the servers defined there.