One of the major issues we faced were getting test sepolia tokens from faucets since we had extensive testing , we ran out quite fast and had to replenish the wallet quite a few times using mining from "https://sepolia-faucet.pk910.de/" and also used drips from googleas well. We encountered several TypeScript syntax errors, like missing commas (Code 1005) and invalid hexadecimal generation (Code 1125) in the mock backend, causing the app to fail. The "Cannot GET /" error also stumped us due to port confusion between the frontend and backend. We overcame these by debugging with detailed error logs, adjusting the mockBackend.js file to use valid hex generation (Math.floor(Math.random() * 0x100000000).toString(16).padStart(8, '0')), and ensuring the Next.js frontend ran on port 3000 while the backend used 3001. Collaboration with AI tools helped identify and fix these issues efficiently.