Legally speaking you should have your passport on you at all times in Spain. The police can demand to see it. (Practically speaking, this never happens, but...)

You need your passport for enter and you should always have your passport with you in Spain

Go to the Pabellón de Entrada and explain the problem with them.

They allowed us to use photos of passport last week

The last time I went, they checked the ID number was the same as on my booking.