React Nextjs offline support PWA

I need an expert in React and NextJS that can run a website offline (PWA) that is already developed. We are using React + Redux + NextJS with custom server and the problem we have is that when the page is refreshed it falls into an internal server error (error 500) because Nexts tries to fetch the data from the API via server side (express) and does not serve via the service worker. The first step is to make the official [login to view URL] example of the next-offline module work. If this is not possible, look for implementation alternatives. The other issue is when the network is very slow we have some errors failed to fetch the [login to view URL] and the page falls into error (many of Uncaught (in promise) DOMException in the console log) We have a deadline for the delivery of the product, therefore we are looking for someone who has already worked with PWA and Nextjs Please include the word egg in your proposal to avoid auto bid. You should write how you would do this in detail in your proposal to show me your ability. Thanks.