Help resolving custom loot table issues involving a written book

I’m currently working on a project that includes custom loot tables with semi-custom items. So far it’s been working perfectly with all sorts of items, but when I tried to add a written book with nbt data, things stopped working. I ran the code for the loot table through a (json editor) and it checked out but it clearly doesn’t work – Whenever the book is included in the loot table, nothing generates at all.

Here’s the snippet that causes all the issues:

(...){"type":"item","name":"minecraft:written_book","weight":1,"quality":12,"functions":[{"function":"set_nbt","tag":"{pages:['{"text":"SMITE"}'],title:"Tome of Smiting",author:"Bryuf"}"}]},(...)

(The ellipses are just to indicate that this was taken from a wider context involving the correct start and end parameters for loot tables)

Can anyone figure out what I’m missing to make this work?