Firstly, please check if you have agreed to the plugin's terms of use.
You can find it in Settings -> Education -> User Agreement.
Enable this option and save the settings. Then restart the IDE and the project.
Here are some more important recommendations:
- Log out from your Hyperskill account and log back in from Settings/Preferences > Tools > Education.
- Remove the project from the Recent Projects view on the Welcome Screen.
- Start a Hyperskill project by going to Learn > New Course from the Welcome screen, in the File menu by choosing Learn and Teach > Browse Courses, or select a project directly from the platform after selecting a course.
- Verify whether "Swing" or "JCEF" is selected in Help | Find Action | Switch Task Description Panel. If "JCEF" is selected, consider switching it to "Swing" to see if it resolves the issue.
If the steps described above did not help, please collect the full IDE log bundle as per this article and attach it to this support form. Don't forget to include a link to your profile and a problem or project stage you're trying to solve. It will help us to understand the issue and process your request much faster.