Yeah broken for me too (pihole here). I'm guessing even if I turn off pihole, google tag manager is going to get blocked by one of my adblocker extensions also.
Lesson here: Write your JS so it doesn't break completely when things like Google Analytics or Tag manager don't load/are blocked.
Hm... If it's the desk images, they're being hosted on Cloudinary? Otherwise, I didn't know that GTM could block that content from loading