Can't install NoDogSplash - Error Read Only File System

Hi, I install NoDogSplash and i have error : Read Only File System.
I user Router TP Link WR 841N and I want install by command opkg install nodogsplash. And this is error
image
So how i can install NoDogSplash for my router :frowning:.

Please don't open multiple topics for the same problem

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