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Error after upgrade from next.js 15.2 to 16

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Spectacled bear posted this in #help-forum
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Spectacled bearOP
Hello guys, i upgraded the version of next.js to the latest 16.0.0 and i try to run my application, the landing page is okay, after i click any route i got this error:

An unknown Component is an async Client Component. Only Server Components can be async at the moment. This error is often caused by accidentally adding 'use client' to a module that was originally written for the server.

Even though the application was working very good with 15.2 version. There is no client component as async

17 Replies

@alfonsüs ardani i dont have issue with this when migrating to 16. is it okay if we investigate what component is causing this issue?
Spectacled bearOP
Yes but meanwhile i found that only if i navigate through the application the route with <Link> im having this issue. When i try to search in my browser directly the route it works fine
Spectacled bearOP
Which component exactly?
@Spectacled bear Which component exactly?
what does the error looks like?
Spectacled bearOP
@Spectacled bear Click to see attachment
can we see whats at inpage.js?
Spectacled bearOP
Spectacled bearOP
the error on incognito browser:
@Spectacled bear We're hitting the same thing, introduced going from 16-beta.0 to 16
Spectacled bearOP
@Matt u found out any way to solve it?
We just revered back to beta and it’s been fine
@Spectacled bear Click to see attachment
Spectacled bear
At first glance, it looks like it could be a browser extension causing it? Do you have browser extensions disabled in incognito?
In our case it can't be a browser extension. We package our app in a WKWebView in an iOS app bundle that doesnt' support extensions
Not sure for other cases
@Spectacled bear At first glance, it looks like it could be a browser extension causing it? Do you have browser extensions disabled in incognito?
Spectacled bearOP
Yes, I tried with incognito browser where no extension was installed and the same problem appeared