Why does validator say missing of X-WOPI-ItemVersion

[lavender-lee]

Recently, I am using wopi-validator-core to validate the implementation of wopi protocol. When validator tells me that "the X-WOPI-ItemVersion header is not presented on the response" in the first time, I then add this header immdiately. However, the error still exists when I have added that header. Please see the following screenshot.

[Prototipo-Erick-Santander]

I don't know if this helps or if you already solved it, but if your fileId is numeric, it needs to be a string, according to the docs.