“The iss do not match with this server” in Course Wishlist and Course Review

Interesting, this problem happened after I installed Sublanguage plugin. I disabled it now and the problem fixed.

Does anyone know why a problem like this might happens?

Hi mhmdsalah,

Thank you for reaching out and providing such detailed information about the issue you encountered with the Course Review and Course Wishlist add-ons. We appreciate your thoroughness in troubleshooting the problem.

We’ve also conducted tests with the same add-on versions you mentioned (LearnPress – Course Review 4.1.5 and LearnPress – Course Wishlist 4.0.8), along with the Sublanguage plugin, and haven’t been able to reproduce the “‘lp_jwt_auth_bad_iss'” error you described. Our tests were performed using the default Twenty Twenty-Five theme.

Since the issue appears to be related to the interaction between the add-ons and the Sublanguage plugin, it would be very helpful if you could provide us with more information about your Sublanguage plugin setup. Specifically:

1. Sublanguage plugin version: Knowing the exact version of Sublanguage you’re using will help us ensure we’re testing with the same configuration.
2. Sublanguage settings: Could you please describe how you configured the Sublanguage plugin?
3. Steps to reproduce the error: If possible, could you outline the specific steps you took to trigger the “‘lp_jwt_auth_bad_iss'” error? This will allow us to try and reproduce the problem on our end.

Additionally, could you please try temporarily switching to the Twenty Twenty-Five theme on your site to see if the issue persists? This will help us rule out any theme-specific conflicts.

We look forward to hearing from you and helping you resolve this issue.

Best regards,
Brianvu-tp

Hello, Thanks for the replay.

Sublanguage version: ?2.12?

This problem happens to me when i use the REST API of learnpress.

To reproduce first make a request to the token endpoint to get the token:
"/learnpress/v1/token"

Then use this token to send request to any of the Course Review and Course Wishlist add-ons for example you can try this endpoint:
"/learnpress/v1/wishlist/course/(?P<id>[\\d]+)"

You will get:

{
  code: "lp_jwt_auth_bad_iss",
  message: "The iss do not match with this server",
  data: {
    status: 401,
  },
}

I use Twenty Twenty-Five theme. but I think the problem with REST APIs only.

What I find strange is that the LeanPress endpoints itself are working great, the problem happen only with the add-ons.

• This reply was modified 1 month, 2 weeks ago by mhmdsalah.

Here is all Sublanguage config

Hi mhmdsalah,

Thank you for the detailed explanation and steps to reproduce the issue. We appreciate you taking the time to provide this information.

The lp_jwt_auth_bad_iss error indicates a mismatch between the decoded JWT token’s iss (issuer) claim and the current site URL (obtained via get_bloginfo('url')).

We’ve attempted to reproduce the issue locally using the Sublanguage configuration you described and then tested with the API endpoint wp-json/learnpress/v1/wishlist/course/COURSE_ID. Our tests, however, returned the expected results.

Given this discrepancy, could you please double-check the URL you are using in your API requests? A slight error in the URL could potentially lead to the iss mismatch.

Best regards,
Brianvu-tp