Unrelated Masters in Germany

Hi, I graduated with a bachelors in architecture with a score of 8 CGPA, and have a work experience as a growth manager at a design and build firm for two years. My GRE score was 315 (Quant 160, Verbal 155),

I want to study Master's in International Business in Germany, preferrably at Humboldt. But all colleges seem to have an admission requirement of having ceritain ects credit in econimics etc. Is that really it for me? I have dreamed of studying IB in germany since the second year of college and its really heart breaking now.