Error \pgfpages@layoutbefore@6 on 1 already defined

Hello. I am new to Beamer. Using this theme, my pdf failed to compile. I used the hello world example. The error is: ```! LaTeX Error: Command \pgfpages@layoutbefore@6 on 1 already defined.Or name \end... illegal, see p.192 of the manual.See the LaTeX manual or LaTeX Companion for explanation.Type H for immediate help.... }```.

Is this fixable? Thanks!

Reproduce the error with the hello world example and the Beamer-TUe theme, then inspect the theme's LaTeX definitions related to pgfpages layout commands. Done means identifying the conflicting definition and confirming that the example compiles without the reported error.

Written by the indexing model from the issue text.