I have created a LaTeX document. I have used the following setting:

Now I am trying to transfer my document into a Template. The Template uses the following settings:

Now, I have simply transferred my chapters to this new Template and added my packages. But there are a couple of errors that occur.

As far as I understand some of these errors occur, because my packages don't go along with packages used in the Template. For example subcation doesn't seem to go along with subfig. Also in the ihf-package, there are a couple of packages ... I don't know defined? The siunitx for example seems to be included in the ihf package and a .tikz package as well.