Proof of enrollment is an official document from your university confirming that you are currently registered as a student. It typically includes your name, the name of the institution, your student number, and the academic year or semester in which you are enrolled.
It must be signed—either digitally or physically—by the university. Unsigned or unofficial versions can easily be edited, so the signature confirms its authenticity. Landlords and housing providers must verify your student status for legal and contractual reasons.
Why the example you submitted may not be valid
No official stamp
No signature
Not labeled as “Proof of Enrollment” or similar
It’s a informational letter, not a confirmation of active enrollment.
Does not confirm you are currently enrolled, but admitted to start your studies.
What a valid proof of enrollment should include:
An official stamp from the university
A signature (digital or handwritten)
A clear title like “Proof of Enrollment” or “Statement of Enrollment”
Confirmation of active enrollment
Issued by the registrar's office or official student administration.
Please request the correct document from your university and upload it here.
This document is a good example of valid proof of enrollment. 
