KB442460: During a Silent Installation of MicroStrategy, error "The specified directory /opt/app/mstr is not empty. " occurs when directory is empty.

Summary:
During a Silent Installation of Strategy, it throws a warning "The specified directory /opt/app/mstr is not empty." when trying to run setup.sh, not allowing you to continue the installation.  This warning can be safely bypassed.
Symptom:
When performing a Silent Installation for Strategy, the installation will stop with the following message:
 

[10/25/2018 12:58:20:848 EDT][AdvancedLog][WARNING][TargetDirectoriesDialogSilent][isValidDirectory]: The specified directory /opt/app/mstr is not empty.

This message will appear even when the specified directory is empty.
Cause:
This can sometimes be caused when the directory is already created before running the setup.sh command, even if there are no files or folders in the /opt/app/mstr directory.  This is a warning message that can be safely bypassed.
Action/Workaround:
When running the setup.sh, add "-bypass warning" to the command to safely ignore this warning.