What can I say? After a whole day of trying different solutions and attempting many things to find and then fix the cause I have to admit defeat. I don't really know what caused the delays and for now, we only managed to get things going, so that's a small victory there.
At this point, I realize I forgot the first thing I should have done - communicate. And I'm sorry for that, no excuses. I'll keep working and will let you guys know once things get going at normal speed again.