Internal error / JSON::ParserError (859: unexpected token at ''):

[silviu001]

Hello,

I am running Redmine 5.0.4.stable (docker hub official image). I have installed redmine_openid_connect version 0.9.4 and configured a Keycloak instance for OpenID Connect SSO. I have checked the Keycloak JWT generated token and it contains every attributed described in the README. After I authenticate my user I get Internal error and redmine logging (debug) outputs:

I, [2023-01-17T09:47:48.703454 #1] INFO -- : Completed 500 Internal Server Error in 30ms (ActiveRecord: 2.9ms | Allocations: 2442)
F, [2023-01-17T09:47:48.704098 #1] FATAL -- :
JSON::ParserError (859: unexpected token at ''):

plugins/redmine_openid_connect/app/models/oic_session.rb:125:in get_user_info!' plugins/redmine_openid_connect/lib/redmine_openid_connect/account_controller_patch.rb:83:in oic_local_login'
lib/redmine/sudo_mode.rb:61:in `sudo_mode'

What can I do further to overcome this issue? If necessary I can provide extra information if necessary.

Thanks,
Silviu.

My full environment:

Environment:
Redmine version 5.0.4.stable
Ruby version 3.1.3-p185 (2022-11-24) [x86_64-linux]
Rails version 6.1.7
Environment production
Database adapter PostgreSQL
Mailer queue ActiveJob::QueueAdapters::AsyncAdapter
Mailer delivery smtp
Redmine settings:
Redmine theme Default
SCM:
Subversion 1.14.1
Mercurial 5.6.1
Bazaar 3.1.0
Git 2.30.2
Filesystem
Redmine plugins:
redmine_openid_connect 0.9.4

[bilelzr]

can you provide me the configuration on the plugin