Thumbnail creation on Windows currently fails because opening the file before passing it to NamedBlobFile results in Windows Error 32 ("The process cannot access the file because it is being used by another process.").
Passing only the file data as a string fixes this.
Thumbnail creation on Windows currently fails because opening the file before passing it to NamedBlobFile results in Windows Error 32 ("The process cannot access the file because it is being used by another process."). Passing only the file data as a string fixes this.