I just continued to log in here today, thank you for your replies, but the problem is still not resolved. After setting the path with the trezor hardware wallet yesterday, I still can't sign.
"
Setting the path", what do you mean?
Anyways, have you upgraded your Trezor's firmware to the latest version? No?
Here's their official guide on it:
https://trezor.io/learn/a/update-trezor-device-firmwarederivation path. Wallets have this functionality. Why can't I upload pictures to this forum? Upgraded to latest version still the same.