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We recommend to check the following things:
- Manage Appsadd-ons: is the JSU app enabled... and all modules enabled (except one, which is disabled per default!)?
- Check your log files, serious problems usually leave a stacktrace. Do you see a reference to a class com.googlecode.jsu.*? (to determent which module cannot be loaded)
- Re-install the app
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With the following steps, this can be resolved:
- Go to the UPM (Manage Appsadd-ons)
- Enable Safe Mode
- just enable JSU and try to go to the configuration page
- disable 'Safe Mode' with option to restore the previous configuration
- try again to go to the configuration page.
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