Cannot add Cat9500-24Y4C as Edge

[trockstr]

Hello, 

I'am at this moment at an customer PoC and have a showstopper. 

We have for C9500-24Y4C devcies. Two are configured as Border+control Plane with no problems. 

But the other two are not possible to add as edges. The error message is java.lang.null.pointer.exception

DNAC v1.2.10

IOS-XE v16.9.3

Can anybody help?

[Karthik Kumar Thatikonda]

Please collect rca on the Cisco DNA-Center using "sudo rca" command and export the file to attach to a TAC case for further debugging.