remote_json encounted a go json error

[qscez2001]

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Describe the bug

When I want to integrate the keto service and oathkeeper,
I adapted to remote_json and write a rule from sample as below
It's not able to create an access rule because of a json unmarshal problem

level=error msg=Unable to update access rules from given location, changes will be ignored. Check the configuration or restart the service if the issue persists. audience=application error=map[message:error unmarshaling JSON: json: cannot unmarshal object into Go value of type []rule.Rule stack_trace

I already set the matching_strategy: regexp

Some Access Rule: access-rule-1.yaml

id: access-rule-1

match: ...

upstream: ...

authorizers:

• handler: remote_json
  config:
  remote: http://my-remote-authorizer/authorize
  payload: |
  {
  "subject": "{{ print .Subject }}",
  "resource": "{{ printIndex .MatchContext.RegexpCaptureGroups 0 }}"
  }

Reproducing the bug

level=error msg=Unable to update access rules from given location, changes will be ignored. Check the configuration or restart the service if the issue persists. audience=application error=map[message:error unmarshaling JSON: json: cannot unmarshal object into Go value of type []rule.Rule stack_trace:
oathkeeper_1 | github.com/ory/oathkeeper/rule.(*FetcherDefault).decode
oathkeeper_1 | /project/rule/fetcher_default.go:382
oathkeeper_1 | github.com/ory/oathkeeper/rule.(*FetcherDefault).fetchFile
oathkeeper_1 | /project/rule/fetcher_default.go:361
oathkeeper_1 | github.com/ory/oathkeeper/rule.(*FetcherDefault).fetch
oathkeeper_1 | /project/rule/fetcher_default.go:304
oathkeeper_1 | github.com/ory/oathkeeper/rule.(*FetcherDefault).sourceUpdate
oathkeeper_1 | /project/rule/fetcher_default.go:153
oathkeeper_1 | github.com/ory/oathkeeper/rule.(*FetcherDefault).watch
oathkeeper_1 | /project/rule/fetcher_default.go:265
oathkeeper_1 | github.com/ory/oathkeeper/rule.(*FetcherDefault).Watch
oathkeeper_1 | /project/rule/fetcher_default.go:179
oathkeeper_1 | github.com/ory/oathkeeper/driver.(*RegistryMemory).Init.func1
oathkeeper_1 | /project/driver/registry_memory.go:72
oathkeeper_1 | runtime.goexit
oathkeeper_1 | /usr/local/go/src/runtime/asm_arm64.s:1172] file=file:///etc/config/oathkeeper/access-rules.yml service_name=ORY Oathkeeper service_version=v0.40.0

Relevant log output

No response

Relevant configuration

No response

Version

oryd/oathkeeper:v0.40.0

On which operating system are you observing this issue?

No response

In which environment are you deploying?

No response

Additional Context

No response