Need a blockchain developer to fix my issues. Urgent

Hi talents. I'm looking for a blockchain developer who can fix my issues. I made bitcoin withdraw function in nextjs. It works well on dev mode, but it doesn't work on prod mode. On dev, I don't have any issue because Webpack does not Uglify the code. But in prod I have this problem:
error:
Expected property "1" of type BigInteger, got n

If you works well, it might be long term.
If you are interested, please reach out soon.
Thanks