Is it impolite not to attend a Quinceañera?

I'm not very close with this girl, but she invited me to her Quinceañera in two days. I've been incredibly busy and I don't think I'll be able to attend. I'm not Hispanic and I have no clue about any customs. I'm not sure if it's rude not to attend. Is it okay if I just send a text saying I don't think I can make it and wish her a wonderful night?

Is it impolite not to attend a Quinceañera?
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