I've recently finished Overview of Neo4j 4.x tutorial and I received my certificate pdf, but it's font has a problem, shown in the following picture:
Hello @mreza.azizi74 and welcome to the Neo4j Community!
Unfortunately, your certificates for course completions on our legacy GraphAcademy site (Free, Self-Paced, Hands-on Online Training | Free Neo4j Courses from GraphAcademy) are currently
broken. We are planning on moving them to the new GraphAcademy site (graphacademy.neo4j.com), but have not yet completed the transition.