Update & fixed
This instance has just been updated to the latest version of WriteFreely (v0.13.2) – it just took me 2 months & a mail from one of our users. 😪
Apperently the last big Mastodon update (v4) broke some compatability with WriteFreely – resulting that you could not follow new blogs from Mastodon instances. (You can read about it here, where other humans brought up the issue.)
Already followed blogs/follow relationships where not affacted, so I did not noticed the bug myself. Instead I got a mail from one of our users this morning, alerting me to this bug.
Long story short: fixed & updated to the latest version 🎉 If you wanna know what's new, have a look at the official changelog.