The Service Desk Project isn't created.

[gendir@teplo-inform.ru]

hi! I have licensed applications Jira Service Desk and Jira Software. Jira Software app works well. But I can't create any Service Desk project!

I select any type of Service Desk project and click on the Next button.

Then I enter the project name, key, Project Lead in the fields and click on Submit button. Аn error appears on the screen: "Hmm... we couldn't create your project due to an unknown error. Try refreshing the page to start again." Refreshing the page or anything else does not work.

Other JIRA projects are added and working properly.

[Ivan Tovbin]

Hi,

I think you came across a known JSD bug, which prevents service desk type projects from being created if the default language is set to Russian. Check this ticket for more details. 

The workaround is to change you default language to English, create a project, and then change it back to Russian. It's rather annoying I know, but we're stuck with it untill Atlassian releases a fix.

You might wanna check this ticket as well. It seems that it's can also be related to your issue.

Edit: Also check this answer for more possible solutions.