The version 1.4.4 of encoder.h available in the Arduino library manager does not appear to match the current version of encoder.h in github Encoder/Encoder.h at master · PaulStoffregen/Encoder · GitHub (as I now see @westfw has already pointed out). Changes were introduced on 13.03.2024 in the Github repository including several lines for the UNO R4 WIFI and Minima which are not present in the library manager version. Change details: pin register · PaulStoffregen/Encoder@063b390 · GitHub
EDIT
See issue report: Arduino UNO R4 MINIMA not supported · Issue #98 · PaulStoffregen/Encoder · GitHub