Yesterday I installed the new Developer Beta Build 19D62e.
Directly after installing the Beta Geekbench ran without hitch. The Appstore version (5.02) as well as the one from your website (5.1.0).
But after the first restart, both versions showed blank windows only.
Can you tell me where the string is supposed to come from NVRAM, gobbled together from system features, stored in a plist or part of the Apps resources. So I could check whether there is an error related to that (permissions for files, cleared/overwirtten NVRAM etc.).