Humidity

Good morning friends, I have a question for you, we started building 3 years ago and have been living inside for one and a half years now, we have a solid brick house.

Everything actually fits well except for our lift-and-slide door (4m) where slight moisture forms on the left and right.... But we can't figure out what it is!!
It is not a pipe burst, we have already checked that.....

Do you maybe have an idea?
If you need more info, just let me know

Thanks in advance

Attached are two photos....

Without knowing what I am talking about: how is the terrace connected?
Water will probably come from outside.

How is the door drained?

How is the door drained?

What exactly do you mean by that?

Please post photos of the exterior - what does it look like there? If you have any photos from the construction phase.