Hi,
The most common cause of this issue is a mismatch or corruption in the WordPress permalinks.
Go to Settings > Permalinks in your WordPress dashboard.
Without making changes, click Save Changes to regenerate the permalinks.
Check if the issue with course and profile links is resolved.

Ensure that the LearnPress pages are correctly assigned.
Go to LearnPress > Settings > General.
Verify the following page assignments:
Courses: Linked to the page displaying the course archive.
Profile: Linked to the profile page.
Checkout and Become a Teacher: Also check these pages.
If any page is unassigned or missing, reassign them or recreate the pages from LearnPress > Tools > Setup Wizard.

If your site uses caching plugins (e.g., WP Super Cache, W3 Total Cache), the cache might cause old links to persist.
Clear the cache from your caching plugin’s settings.
If your hosting provider uses server-level caching (e.g., Varnish), clear it from your hosting control panel.

Other plugins or your theme could conflict with LearnPress after the update.
Temporarily deactivate all plugins except LearnPress.
Switch to a default WordPress theme (e.g., Twenty Twenty-Three).
Check if the issue persists. If not, reactivate plugins one by one and test to identify the conflicting one.

After a major plugin update, database updates might be required.
Go to LearnPress > Tools > Database Update.
Run any pending updates.