Not able to download certificate of course completion

I have completed the "Overview of Neo4j 4.x" course and I submitted all the questions which were asked at the end of each section. I tried to download the course completion certificate it shows the following message.

neo4j_certificate_error

How can I get my course completion certificate?

Facing the same issue, even after trying different browsers and using different laptops too. I couldn't download the course completion certificate. Moreover when I logged out of the open sessions, I couldn't log back in again. It kept giving me following error,
"Error while loading the data, please refresh the page." Attached screenshot for reference.
Any help will be appreciated. Thanks!