NFC Shield V2.0 - Compile Error: 'Serial1' was not declared in this scope

I have the latest version and tried following the test code in # NFC Shield V2.0 - Error compiling for board Arduino Uno, but there is still the error.

ReadTag:2:10: fatal error: Seeed_Arduino_NFC.h: No such file or directory

#include <Seeed_Arduino_NFC.h>

      ^~~~~~~~~~~~~~~~~~~~~

compilation terminated.

exit status 1
Seeed_Arduino_NFC.h: No such file or directory

Here is the test code provided in that topic.

#include <SPI.h>
#include <Seeed_Arduino_NFC.h>
#include  <NfcAdapter.h>

PN532_SPI pn532spi(SPI, 10);
NfcAdapter nfc = NfcAdapter(pn532spi);


void setup(void) {
    Serial.begin(115200); // begin serial communication
    Serial.println("NDEF Reader");
    nfc.begin(); // begin NFC communication
}

void loop(void) {

    Serial.println("\nScan an NFC tag\n");
    if (nfc.tagPresent()) // Do an NFC scan to see if an NFC tag is present
    {
        NfcTag tag = nfc.read(); // read the NFC tag into an object, nfc.read() returns an NfcTag object.
        tag.print(); // prints the NFC tags type, UID, and NDEF message (if available)
    }
    delay(500); // wait half a second (500ms) before scanning again (you may increment or decrement the wait time)
}