I also ran into this same issue recently with an Agilex 7 F-series dev kit (p/n DK-DEV-AGF014EA). Turned out that the problem was that the following assignment was needed:
set_global_assignment -name PWRMGT_SLAVE_DEVICE_TYPE ED8401
Note that a different value for this assignment, "OTHER" as opposed to "ED8401", was mentioned above in this thread. That appears to be incorrect, or at least incorrect for the current version of the dev kit. There appear to be some ambiguities and inconsistencies in the documentation about, part number, version, and serial numbering schemes.
The current version of the package of supporting files for the dev kit does provide documentation and example designs that include the VID settings, though again, not quite as clearly nor consistently as one would hope:
https://cdrdv2.intel.com/v1/dl/getContent/736492