Magento – plus. 0% VAT. – Problem after installation of Market Ready Germany 2

It happened suddenly, that the shop only plus. 0% VAT. was shown. This seems a problem with the extension Market Ready Germany 2 to be, although I would like to save the conjecture here and am relying solely on observations of other users. This contribution brought the solution: I have the Tax.php (app/code/community/Symmetrics/TweaksGerman/Block) of Symmetrics…