Can't edit the article after hosting it on Vercel, even though it works locally

[silvianaim02]

Can't edit the article after hosting it on Vercel (error message : frontmatter not found) , even though it works locally. Below I have attached a screenshot :

[simonswiss]

Hey!

Sorry about the delay in responding. Are you able to share access to the codebase?

[silvianaim02]

Thank you for replying @simonswiss , here is the codebase :

https://github.com/silvianaim02/silvianaimcom