[Question] Failed to load bundle from disk: verification key not provided

[WeipingGan]

When opa client loads bundle from bundle server for the first time, there is no problem. In the second boot, when reading from the disk, an error was reported

Expected Behavior

Load bundle from disk successfully

Actual Behavior

First startup
➜ Opa-binary ./opa run -s -c config.yml

{"addrs":[":8181"],"diagnostic-addrs":[],"insecure_addr":"","level":"info","msg":"Initializing server.","time":"2020-10-27T15:35:21+08:00"} {"level":"info","msg":"Starting bundle downloader.","name":"authz","plugin":"bundle","time":"2020-10-27T15:35:21+08:00"} {"level":"info","msg":"Bundle downloaded and activated successfully. Etag updated to f1d76bb13c76f117aa9da5523d09766b.","name":"authz","plugin":"bundle","time":"2020-10-27T15:35:21+08:00"}

Second startup
➜ Opa-binary ./opa run -s -c config.yml

{"addrs":[":8181"],"diagnostic-addrs":[],"insecure_addr":"","level":"info","msg":"Initializing server.","time":"2020-10-27T15:36:35+08:00"}
{"level":"error","msg":"Failed to load bundle from disk: verification key not provided","name":"authz","plugin":"bundle","time":"2020-10-27T15:36:35+08:00"}
{"err":"verification key not provided","level":"error","msg":"Failed to start plugins.","time":"2020-10-27T15:36:35+08:00"}

But when I run this commad ./opa run -s --verification-key "my-signing-hash-key" --signing-alg HS256 --bundle .opa/bundles/authz/bundle.tar.gz, it can load bundle well. It may not be able to use the key when loading the configuration file

Steps to Reproduce the Problem

This is my config.yml file