Virtual pin V13

That’s the app version, not the library version. You’re using Legacy Blynk (Blynk 0.1) so you should be using library version 0.6.1

If you’ve chosen ESP32 as your device type then you should have 256 virtual pins available.
I’m guessing that you don’t understand that there is no link between virtual pins and physical pins on your board?

You should probably read this:

Pete.