MSCA IF Salary in Spain

Hi, I got an MSCA-IF-EF-ST in Spain. According to the Grant Agreement, my salary is the sum of the living allowance, the mobility allowance and the family allowance (since I qualify for it). My host institution told me that the salary exceeds the limits in the "Convenio" and they cannot make a contract for such salary. Did someone have a similar issue? How did your institution solve the salary limits? Any help will be much appreciated.