On November 14, 2022, USAC announced that E-rate applicants are currently unable to complete certification of Form 470 in EPC. USAC is actively working to resolve the issue.
EPC Form 470 Error Resolved: USAC reports that the issue that was preventing E-rate applicants from certifying their Form 470 has been resolved. E-rate applicants who experienced technical difficulty while trying to certify their forms are encouraged to login in to EPC and certify their forms.
The Form 470 error announcement and resolution can be viewed here.