You're using an outdated version of GR. Use the latest and everything will automagically work.
(ps: some PR rewards store 32 bytes long encryption key in the json, but since the last 8 bytes are all zeros, internally they actually use 24 bytes long key (generating a Twofish encryption key from 32 bytes and 24 bytes yields different results). Older GR did not support this key stripping, but the latest does, tested with PR 0.3.2, 2024_04 to 2024_11.)
I'm pretty sure you haven't. That post you quoted is pretty old, I mean it's before the 32 bytes key support was even added.
Download the latest from
here or from
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(use gitlab if you're unsure, that's always the latest). I've now re-tested this exact binary, downloaded from f95zone, unzipped, both on Windows and Linux with PR 0.3.2 and they work like a charm.