With certain schedules, I get the above error in MCM. I looked over the WMI and I don't see anything particular about this return value:

https://learn.microsoft.com/en-us/mem/configmgr/develop/reference/core/servers/configure/sms_scheduletoken-server-wmi-class

The value returned from the function looks like this:

SmsProviderObjectPath :
DayDuration : 0
HourDuration : 4
MinuteDuration : 0
IsGMT : False
StartTime : 7/28/2023 2:00:00 AM

To assist with this, I'll add a schedule token returned that generates the error: 005C7D4020331680

Adding some more to this, according to our MCM admins, Microsoft recently added the ability to add a "Days Offset" parameter to the options available for 'SMS_ST_RecurMonthlyByWeekday', which seems to have resulted in a new, but undocumented, SMS Provider for scheduling:

https://learn.microsoft.com/en-us/mem/configmgr/develop/reference/core/servers/configure/sms_st_recurmonthlybyweekday-server-wmi-class

I see nothing related to it following that link.

FYI- I was able to get the new recurrence type details from Microsoft. It is returned by using the Convert-CMSchedule cmdlet in the CM PowerShell module:

SmsProviderObjectPath : SMS_ST_RecurMonthlyByWeekdayBase
Day : 3
DayDuration : 0
ForNumberOfMonths : 1
HourDuration : 4
IsGMT : False
MinuteDuration : 0
OffsetDay : 2
StartTime : 7/28/2023 2:00:00 AM
WeekOrder : 3