My laptop does not connect to the main router after setting up a wifi extender

[Windows 11]

I recently setup a TP-link Wi-Fi extender and since connecting to this on my laptop, I can now no longer connect to the main router. When I do connect it says there is no internet. This is only an issue on my laptop. On both my phone and tablet I can connect to the main router or the extender.I tried the steps suggested in this post https://answers.microsoft.com/en-us/windows/forum/all/i-cant-connect-to-my-wifi-but-i-can-connect-to-my/f6a054e1-7ec4-4c14-baa6-fa3fbfc97b3c but none of these steps worked, and actually briefly prevented my laptop from connecting to any network (I have managed

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