Hello,

I think this might be a problem with the version of Tomcat you're using.

I noticed that your version of Tomcat is at 8.5.5, which technically isn't supported per our docs (https://www.labkey.org/home/Documentation/wiki-page.view?name=supported).

The error in question indicates org.apache.tomcat.util.security.PermissionCheck not being found.

It's possible that your version of Tomcat doesn't have that functionality that we need to run LabKey with.

Do you think you can install Tomcat 8.0.36 instead and give this another try?

Regards,

Jon