I wasn't assuming anything like that, quite the oppositeYou're assuming that people know their shit but they don't
Some don't know how to extract a multi part archives or a .rar file.
Remember the "use_fixed_resolution.txt.txt" because of hidden extension file
Some don't know how to copy and past the "saves" folder from previous game version.
So, yes, he's probably missing the webp codec.
From how the question was phrased, I assumed is that the one asking doesn't know much about file formats or how he needs to ask to get an answer that he can use for what he wants to get done.
That's why I wasn't happy with the answer, because yes, it answered the question asked (in a way at least), but it probably wasn't what the guy asking really wanted to ask, have or needs.
Here is a funny (but unfortunately too true) example from project management.
![project_management.jpg project_management.jpg](https://attachments.f95zone.to/2020/03/thumb/616403_project_management.jpg)