For those who needs this later, you can set up http proxy and send a simple get request to https://api.ipify.org , it will give you the ip adress in plain text, no need to parse the json.
One of many simple and easy ways to do it.
Are you using any proxies or fingerprints? Have you tried
reloading the page or using different proxy/fingerprint?
Have you tried loading in regular browsers - chrome/ffox etc?
Can you send test script that reproduces that error or just
post exact web link/address?
