Such messages are sent to cellular phone users in Luxembourg. That's how scammers try to convince people that they are entitled to compensation from the Administration.
Predictably, the link leads to a complete copy of the Guichet portal, suggesting that it's trustworthy. However, this site is a scam site. Any personal data left here ends up in the hands of criminals.
The government of Luxembourg is not the creator or sender of these emails. It is strongly advised that you do not click on the link. For detailed information on benefits to be paid, visit the Guichet portal site.