Due to a problem in Intel® Quartus® Prime Pro Edition Software version 20.3, QSPI flash configuration devices of density 128Mb cannot be successfully programmed with JIC files when used with Intel Agilex® 7 devices.
This applies to the 3rd party QSPI flash configuration devices shown below.
1: Micron MT25QU128
2: Macronix MX25U128
JIC programming of these devices is successful when using earlier Intel® Quartus® Prime Pro Edition Software versions.
To work around this problem, use Intel® Quartus® Prime Pro Edition Software version 20.2.
This problem is fixed starting with Intel® Quartus® Prime Pro Edition Software version 20.4.