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Invariant expected layout router to be mounted" error in Next.js projects

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Pacific sand lance posted this in #help-forum
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Pacific sand lanceOP
Hi everyone,

I'm encountering a persistent error across all my Next.js projects since today, including completely fresh projects . Everything was working fine yesterday.

Error: "Invariant expected layout router to be mounted"


Does anyone have the same problem?

11 Replies

Blood cockle
https://www.reddit.com/r/nextjs/comments/1gvr980/nextjs15/
try deleting the .next folder and running it again
there doesnt seem to be a satisfying resolution on the search results
@Blood cockle https://www.reddit.com/r/nextjs/comments/1gvr980/nextjs15/ try deleting the .next folder and running it again
Pacific sand lanceOP
Okay i was trying to debug it for few hours straight. Got nothing done, then suddenly everything started working again without any changes to the code or files 👍
Blood cockle
glad it worked out. no idea what the fix was, right?
maybe it was a combination of deleting the .next folder, and just restarting everything
@Blood cockle glad it worked out. no idea what the fix was, right?
Pacific sand lanceOP
Yeah, no idea. Was googling until page 5, used maybe 3 different AI’s. Tried cloning my project from github absolutely nothing worked. And then somehow everything went back to normal
@Blood cockle maybe it was a combination of deleting the .next folder, and just restarting everything
Pacific sand lanceOP
Could be, but also on my other projects i did not delete it and they are working now too…
Blood cockle
oh. ok.
no idea then
@Blood cockle oh. ok.
Pacific sand lanceOP
Thanks for trying to help though, appreciate it