Installing Keyman problem

I tried to install Greek classical Keyman. But, the installer doesn’t progress. Just a blanked box with many question marks appeared. How can I install it and use it?

Details for error report for Keyman app:
Application Identifier: kmshell-17.0.332
Error Identifier: 4EF3B798E3DF4455A5C49DE19F79092A

HI @Xintong, I am sorry you experienced this issue. We are tracking the error report here, and hope that @ross will be able to track down the cause.