Catch-all rule crashes routing policy initialization on 3scale

Issue

• When I set the catch-all rule as described in the document, APIcast fails to load the routing policy.

{
   "condition": {
     "combine_op": "and",
   "operations": []
   },
   "url": "http://example.com:80",
   "replace_path": "/403error"
}

2020/11/17 07:57:32 [error] 31#31: *2584291 [lua] policy_chain.lua:103: load_policy(): Policy routing crashed in .new(). It will be ignored., context: ngx.timer#015
2020/11/17 07:57:32 [warn] 31#31: *2584291 [lua] configuration.lua:76: build_policy_chain(): failed to load policy: routing version: builtin err: /opt/app-root/src/src/apicast/policy/routing/rule.lua:47: attempt to get length of field 'operations' (a nil value), context: ngx.timer#015