Print button refers to wrong url

I have integrated editor on my website with custom document storage. Print button generates an url, which gives 404 error. This url should send request on documentserver. I investigated, that the difference between success request on documentserver and this failed request is in only office image version in the path. Succeeded requests looks like, but unsucceeded url looks like What could be an issue? Where is the failed url formed? How to fix it?

Hello @dreztsov

You can download and install sample document storage example on the language that corresponds to your a actual custom storage to check how it works there:

In general, I can see that the version that you are using is outdated. Please update your Document Server to the actual version 7.4 and check the situation again.