What the posts mean is they've got it fixed in their current build, and said build just hasn't been released to us yet. No worries and just a matter of time.
While we wait Hype Train, you can navigate to C:\Program Files (x86)\Steam\steamapps\common\Stellaris\localization and you can then open guardian_l_english.yml using notepad. You can find the text there near "### CURATORS". Also, the buffs against leviathans from your purchase are actually working fine, so once you manually read the text from the game files you won't be missing out anything and we'll be held over nicely until we can read the story content in-game again.