Openwrt router locked

Hi I just got the new reRouter and trying to set up wireguard,
I changed the IP to a static and then when I went change it again it again, Changes could not be made. Apply request failed. Same when I tried turning back on the radio etc.

In putty I cannot make any changes

Seems locked and read only?
Please help[

Q5: How do I fix my device when I faced the “Read Only Root filesystem”?

For devices in the “Read Only Root filesystem”, we can use e2fsck to check the system and fix it. Please open the terminal window and run the following command:

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e2fsck /dev/mmcblk0p2

found this and got to work with built in termal, putty didn't work for me