Part of the Furniture
Is there an easy way to patch iptables to continue the listing (moving on to next line of rules) after it prints the error?
I do not know. Yet. I'll check.
The problem is in the kernel configuration, namely IP_NF_SECURITY and IP6_NF_SECURITY configs are not set. The same in the stock. So kernel does not support this "security".
This causes soft brick for R9000... Too bad. It is hard to trace the kernel level issue.