The TL-WR841N is able to find a filesystem on fw2tar version f44361d4c64e9e6f54d940cb2637bf9283961a29 and not on latest. For reproduction see: https://github.com/rehosting/rehostings/blob/69293a90c76af5603bd0b1437684584b1f73cd0d/tp-link/TL-WR841N_EU_V14/Dockerfile.tl-wr841n#L2
The TL-WR841N is able to find a filesystem on fw2tar version f44361d and not on latest.
For reproduction see: https://github.com/rehosting/rehostings/blob/69293a90c76af5603bd0b1437684584b1f73cd0d/tp-link/TL-WR841N_EU_V14/Dockerfile.tl-wr841n#L2