I made a couple of samples with different forms of data and it turns out that the date should be:
1. The first column in the data set
2. It must not have date gaps
3. The complete date series must by unique in date (all values and breakdows must be aggregated by date before loading to forecast)
If I am mistaken feel free to correct me, but so far I think this was the problem
Thanks anyways 🙂