gh-300 error while taking assessment

Contact Pearson VUE Support immediately to document the GH-300 OnVUE launch failure and request rescheduling; Microsoft directs GitHub Certification candidates to Pearson VUE for both exam-delivery and appointment issues.^1^

Request the reschedule

1. Open Pearson VUE Support from the Microsoft Credentials support page cited above.
2. Select support for a Microsoft/GitHub Certification exam.
3. Provide:
   • Exam: GH-300
   • Scheduled date and time
   • The message: “Unable to connect to *.pearsonvue.com”
   • The screenshots
   • Whether the failure occurred during check-in or before the exam launched
4. Ask Pearson VUE to record this as a technical exam-delivery failure and reschedule the appointment. A Microsoft Q&A case involving the same GH-300 OnVUE launch problem also directs candidates to Pearson VUE.^2^

Do not publish the OnVUE access code shown in the screenshots; provide it only through the official support case if requested.

If the appointment is still more than 24 hours away

You can reschedule it directly:

1. Sign in to Microsoft Learn.
2. Select your avatar → Profile.
3. Open Credentials → Certifications.
4. Find the GH-300 appointment and select Reschedule.
5. Complete the change after being redirected to Pearson VUE.^3^

Reschedule at least 24 hours before the appointment. Rescheduling later than that can forfeit the exam fee or company-purchased voucher.^3^ If the exam time has passed or the option is unavailable, use Pearson VUE Support rather than booking and paying for another attempt.

Prevent the same error on the rescheduled attempt

The displayed message indicates that OnVUE cannot reach Pearson VUE services through the current network path. Pearson VUE’s troubleshooting guide covers this connection/system-test failure.^4^

Before the new appointment:

• Avoid a corporate, school, VPN, proxy-filtered, or otherwise managed network.
• Use a personal computer and a stable home connection where possible.
• Disconnect any VPN or proxy.
• Run the OnVUE system test again and proceed only when the connectivity check completes successfully.
• If using a managed network is unavoidable, ask its administrator to review Pearson VUE’s firewall requirements.^5^

For problems occurring during an active Pearson VUE exam, use OnVUE Support live chat; for problems before or after the exam, contact certification support.^6^

References

1. Credentials support
2. Unable to launch exam on OnVue - Microsoft Q&A
3. Reschedule and cancellation policies
4. Troubleshooting guide for the OnVUE system test
5. Configure the firewall - exam delivery workstation - Pearson VUE
6. Frequently asked questions (FAQs) about online proctored exams