Access-Control-Allow-Origin error

I am looking for a developer who can help me resolve an Access-Control-Allow-Origin error on my website. The ideal candidate should have experience with the following:

- React app with server.js (express)
- Node.js
-IPFS
-axios
-api calls

Requirements:
- Ability to access the server or backend of the website
- Familiarity with the technology stack of the website, specifically Node.js
-Site is hosted on IPFS (https://ipfs.tech/) not sure if this is causing the issue and is making api calls to coinmarketcap.com

Please note that the URL of the website will not be disclosed.