Monero subaddress is not supported

[sonalder-darlene]

Describe the bug
The extension doesn't allow the use subadress. The error message is : Monero Gateway Error: Monero address is invalid
I've double checked, triple checked the adress is correct !

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Add a subadress in Monero Gateway Settings Monero Adress'
2. Click on 'Save changes'
3. See error

Expected behavior
Subadress is a key feature of Monero and should works

Desktop (please complete the following information):

• OS: [macOS X 12.0.1]
• Browser [Firefox]
• Version [98]