Did I mess up? (Template)

I have a 1% understanding of Notion and only use templates. Last night I found a template that was close to what I wanted to achieve. I began editing it, but I realized my tinkering had broken the template's formula. I deleted the entire template this morning and attempted to re-add it. I can preview the template, but once I click "start with this template," the page doesn't load. Is this a general error, and should I check back later, or did I remove my option to use this template, and if so, is there a way to fix it?

Thanks in advance.