JSON readtable error

ob-ipython is great and works well, it is breaking other functionalities. It may be too vague, but weirdly enough, after loading ob-ipython, I cannot export other org files to pdf because it gives that "JSON readtable error", even though the .org doesn't have any code block.

I have no clue where to start looking at to find why ob-ipython is breaking other functionalities. The debug messages are not helping very much (considering the short time I have to invest in fixing it myself at the moment). Any help is much appreciated.

The problem only happens when I load emacs and add ipython to `org-babel-load-langugage` with
```
(custom-set-variables '(org-babel-load-languages '((ipython . t))))
```