Number the variables {{1}}, {{2}} in order and give every one an example value.
Meta rejects templates whose variables skip a number, mix numbered and named styles, or have no example value. Avox checks this before sending the template to Meta.
Renumber the body's variables {{1}}, {{2}}, {{3}} with no gaps.
Fill in an example value for every variable.
Still stuck? Send AVX-3404 to hello@theavoxai.com along with what you were doing when it happened.