Cannot add a wallet to my Node

[lertsoft]

Describe the bug
Cannot add a wallet to my node.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'https://betanet.mysterium.network/user/payments'
2. Click on 'Built-in UI'
3. it will take you to the Node
4. See error (there is nowhere to put the wallet address)

Expected behavior
A straightforward way of implementing the wallet to the node so that payments could be fulfilled.

Screenshots

Environment (please complete the following information):

• Node version: [e.g. 0.40]
• OS: [e.g. raspbian buster, debian 10]

[chompomonim]

This will be fixed after #2881 is done.