looking at how paths are constructed in your scripts, it looks like there are extra ' (single quotes) around the path strings which seem to upset the op() method in 2025.30k.
would have worked in 2023.10k but now returns None
We will have a look why this is happening but generally those escaped extra quotes are unnecessary for your scripts to work. You can simplify it like this:
As it’s cleaner is it also less error-prone with not having to keep track of + and quote marks.
There is a lengthy explanation here on string formatting which can shed more light on the different approaches: