Hey, you can join their discord https://discord.gg/qcpmt9B and you'll know about issues faster and they can also answer your query faster.
You can try changing the node via link, e.g. https://peakd.com/?node=api.hive.blog
There seems to be an issue with some of the nodes.
Thank you, @espoem, I've joined their Discord and it seems the node was the cause of the problem as changing it resolved the issue!
Stay safe :)
Hm, actually it seems I'm not able to save api.hive.blog as the default node so when I close the browser and return, I face the same issue again... I'll have to report that :)