Hello,
If you want to use Hand2Note with a VPN running. You have to do it with a VPN which offers split tunnelling option.
As far as i know this features are available in Express VPN and also Private Internet Acces.
In VPN settings you can select to skip using VPN for Hand2Note but to keep using VPN for all other sites and apps.
Like this(example below is Private Internet Access VPN):
https://prnt.sc/1u3yees
Then it will work and no errors will appear.
