Currently when using libreddit app Libreddit v0.22.9 it gives the below message
Failed to parse page JSON data: expected value at line 1 column 1
Head back [home]
According to github libreddit page this version is discontinued and users should use Libreddit's Public Instances are Shutting Down · Issue #840 · libreddit/libreddit · GitHub
Hopefully you can update this app soon.