So I'm trying to use Sparrow to find my hardware wallet, but I keep getting this error: Could not open client or get fingerprint info; could not open port 'COM4': PermissionError. Access is denied. Anyone got suggestions on how to fix this? Thanks!
Have you ever set udev rules? If not what is your OS?
Similar error: https://github.com/sparrowwallet/sparrow/issues/561
Also, take note of their guide:
As vv181 already mentioned: Make sure to close the Blockstream Green app if it is installed. Only then you can run Sparrow as admin.
Often it can simply be related to the USB port or the cable. So just swap the ports and check the cable.
If the problem really only occurs on a specific PC, it is worth taking a look at the device manager. Check if there are any problems with the COM ports. (especially COM4)
Often just a driver update is needed.