LaTeX Error: Loading a class or package in a group.

[tsaber]

I get this error trying to compile my thesis, this file in particular:

It has worked flawlessly before. Is this a recent change?

Expected behavior:
Document compiling

Actual behavior:
LaTeX Error: Loading a class or package in a group.

Context:
I upgraded the texlive manually first, then used tuetenk0pp dockerfile, which automates the update.
The issue persists.