Update: 4th April. I spoke to studera.nu and it looks like this problem is fixed now.
The studera.nu website now has the following information: (it’s in the column on the right hand side of the page)
“NEWS: Due to a technical malfunction on Your pages, applicants get the wrong information about their eligibility status for master’s studies right now. As this glitch will be fixed by 12 March, we kindly ask you to disregard the following notes for the time being: ‘Requirements not fulfilled’, ‘Unqualified’, ‘Specific requirements not fulfilled’.”
I’ve had some comments about this here, and have seen that students are concerned by this (and quite rightly so) on the studera.nu facebook group – hopefully this will answer some concerns. I can’t imagine that things are going to be any calmer on the 13th March, however.