Why do I see the problem "Internal loopback button" grey out after enabling it when using internal loopback in the Quartus® Prime Pro Edition Software version 21.3? - Why do I see the problem "Internal loopback button" grey out after enabling it when using internal loopback in the Quartus® Prime Pro Edition Software version 21.3? Description Due to a problem in the Quartus® Prime Pro Edition Software version 21.3, you will see the problem "Internal loopback button" grey out when using internal loopback in the system console. Resolution This problem is fixed beginning with the Quartus® Prime Pro Edition Software version 22.4. Custom Fields values: ['novalue'] Errata 14015165116 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 22.4 21.3 ['Agilex™ 7 FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']