Godot Documents epub file shows corrupt

Godot 4

I can't seem to open the epub file of the offline documentation of Godot on my phone. I used an Android 13 phone. I used the epub file with many readers like Lithium, and it still shows corrupt file.

I downloaded the stable AND latest versions, but all of them show the same results.

Please help!

[NoPhilosopher7]

I am also seeing this issue on my Nook. Adobe Digital Editions seems to be able to deal with it, but my E-reader cannot.