I'm having a related bug when the csl is defined in an extension. Both in 1.2.313 and 1.3.97 on Windows. It works fine on Ubuntu.

```
File _extensions-institute-for-nature-and-forest.csl not found in resource path
ERROR: File _extensions-institute-for-nature-and-forest.csl not found in resource path
```

The report and extension are available at https://github.com/inbo/inboqmd_examples/tree/main/source/report/en

_Originally posted by @ThierryO in https://github.com/quarto-dev/quarto-cli/issues/2945#issuecomment-1380175605_
      
cderv
2023-01-12T11:49:34Z
cderv
bug windows
v1.3
closed
CSL is not found when defined in an extension. 
https://github.com/quarto-dev/quarto-cli/issues/3944