Sorry, but seems like your sharing link is dead, and I can't get files from there again.
That may be fine, as I would like to ask you to gather data again, following next steps:
1. Log in to web UI
2. Go to "Configuration -> JSON Configuration -> oxAuth Configuration"
3. Find "loggingLevel" property and set it to "TRACE"
4. Click the "Save configuration" button bellow
We also would need a network trace of your attempt of using OpenID with Bitrix, presented as HAR file. You can use steps listed [here](https://www.inflectra.com/support/knowledgebase/kb254.aspx) - please use Firefox for that task, Chrome's HARs are flawed. Also don't forget to set "Persist log" and "Disable cache" checkboxes in the console to save everything, not just the recently loaded page.
So you'll need to run the flow, while collecting the network trace data. export it as HAR, and share with us together with `/opt/gluu/jetty/oxauth/logs/oxauth.log`