Cannot create Template

I have tried to create a template of this graphic, but I keep getting the error "There was an issue saving template." with no explanation as to why. My other graphics are working fine. Can you tell me this one will not become a template for other educators in our district to use? https://new.express.adobe.com/id/urn:aaid:sc:US:e1e43dcd-75a2-5a11-95a2-81630b8fa46d