Local Web App Error Fix & Maintenance

Job ID: 39276162

Budget: €30 – €250 EUR

Hi! How are you??You responded to my project brief. I ordered a website, it worked, but now when launched via 'npm start' it gives an error, I need you to fix it, since I don’t understand this at all and maintain the site
ASAP

I`ve attached my code files to brief!

My files via DROPBOX:
https://www.dropbox.com/scl/fi/c90rdn2expfs9rdv7x8vr/site.zip?rlkey=n7urqxdt7sst01ru46p4skvuw&st=vpe4b60m&dl=0

Key requirements:
- Expertise in JavaScript, Node.js, and npm
- Experience in web application development
- Ability to provide regular site maintenance

Please check the attached code files via the provided Dropbox link. There have been no recent changes made to the code, and all dependencies are current. I need this issue resolved as soon as possible. Thank you!
Related categories: PHP JavaScript MySQL HTML Node.js