Hey @SergeiR
I’ve tested it with your address and it works correctly:
Could you check provided server_url and app_id?
I also tried another address 0xCc080c4eC62a1AeF1052fA55B4Ea39182f1ee345 but result is the same for me
Does not only this function work or others too?
You executed x = await Moralis.Web3API.account.getNFTs({address: "0x2C0b0a4D8300AF35e2FDFE93D966B893BdB8005B", chain: "mumbai"}) and it didn’t work for you?
I can connect and disconnect wallet. ATM I only tried getNFTs function of Web3 API.
I also can say that it was working fine before… Seems like there was an update (of the server) and it started to produce an error.
Perhaps for me it will be fixed by creating a new server. But if you would like to investigate this issue more I will leave it as it is right now.
Can you share your server_url and app_id?
Yes sure.
Server URL: https://vw1uxhuol8vp.bigmoralis.com:2053/server
App ID: yCh3QlUbZuOyiJbKFyOYMR3DrzQOCBv9GCnBs96I
ok, I also have errors when using your server
Try to update the server, even if is the latest version.
Update: try to log into the admin panel, and then browse the web3 Api section: https://admin.moralis.io/web3Api, if everything loads ok then the problem should be resolved
Just checked it. Yes, it working great now. Thank you! 
Hello,
I’m having this exact same problem.
In my case I’m using Ganache.
I can log in normally at https://admin.moralis.io/web3Api
Hummmm.
Now it makes sense.
I believe that may be why I am not able to use the API either.
Is this information somewhere in the documentation? I did not find it.
Thanks
It may not be in the documentation, what you mean by I am not able to use the API either?
I was trying to search the NFT by api using {address}/nft in my ganache base.
However received error 504.
ok, that will not work, but if you search on mainnet or testnet then you should not get an error.
Thanks,
I will try it.