Hello and welcome to the forums,
Thank you very much for bringing this issue to our attention.
I can confirm there's a problem with managing default dashboard in fresh 1.2.2 epesi installations. The fix for this issue will be included in the next version, coming soon.
In the meantime, I'm attaching a zip archive with 2 files that should be placed in modules\Base\Dashboard, this should resolve the problem.
Kind regards,
Arek