Issues receiving housing allowance as a student

Hello, I moved to the Netherlands in late January. I registered at my municipality and received my BSN number. Once I got DigiD working, I decided to apply for the housing allowance, since my rental studio is eligible for it.

However when I went onto the "toeslagen" website and applied for it. I received the following message:

"U hebt in deze periode geen recht op toeslag, omdat u niet rechtmatig in Nederland verblijft of omdat uw verblijfsstatus geen recht geeft op een toeslag."

However, I am a student. I have a EU citizenship, however I have another citizenship, could that pose an issue? Has any other student encountered that issue?

My housing is advertised with housing allowance in mind. I do not really know what to do, since my other neighbours applied for it with no issue. I do not know what the issue with my residency is, since I registered at the commune and received a BSN number about 2 weeks ago.

Did anybody else experience a similar issue? What can I do?