Confluence system error after setup

[Anthony Fox]

I've attempted to set up a confluence server 3 times. Each time resulting in the same system error. Not really sure what is the root cause for this problem.

I am able to successfully set up the server. I even was able to create users and surf around to make sure everything works. A few mins later someone attempted to access confluence from their terminal, they encountered a system error. When I reload the page I was on, it now has a system error.

Anyone seen this before?

java.lang.RuntimeException: Error rendering template for decorator root
    at com.atlassian.confluence.setup.velocity.ApplyDecoratorDirective.render(ApplyDecoratorDirective.java:161)

caused by: java.lang.RuntimeException: Error rendering template for decorator global
    at com.atlassian.confluence.setup.velocity.ApplyDecoratorDirective.render(ApplyDecoratorDirective.java:161)

caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'get' in class com.google.common.collect.Lists$TransformingRandomAccessList threw exception java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 at /decorators/global.vmd[line 47, column 30]
    at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:342)

caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
    at java.util.ArrayList.rangeCheck(ArrayList.java:657)

[Nic Brough _Adaptavist_]

Quite a few times I'm afraid.  There are several things that can cause it, and the best starting point to troubleshoot is https://confluence.atlassian.com/confkb/java-lang-runtimeexception-error-rendering-template-for-decorator-root-in-a-page-217743738.html