Can you try without -t option racadm -r -u -p sslcsrgen -g -f 
I have OEMR XL R620 with firmware 2.65.65.65 and Bios 2.8.0 in our environment . i am unable to create CSR via UI login. Can you please suggest solution[IMAGE][IMAGE]
unable to create csr in iDRAC with Lifecycle Controller v. 2.65.65.65 for OEMR 
XL R620