ID:20762 QSF instance assignment source or target '<target>' uses a VHDL escaped identifier that is no longer supported as of Intel Quartus Prime software version 19.3. Update your source or target to a valid instance name.

CAUSE: You used an old VHDL-format escaped name in your QSF. VHDL generate blocks and label constructs no longer follow the same format, and you must update the QSF instance assignment accordingly.

ACTION: Correct the assignment in your QSF.