How to assign issue in the new issue view

Question

We are using JIRA Core. After the new issue view was implemented, all bottoms below the issue title was removed. I could not assign issue. There is no bottom to click and the "assignee" is greyed out. If I manually switch to the old view by clicking "See the old view", everything is back to normal, including assigning issue to user.

Mégane LE PALUD · Answer

I had the same problem and it solves it! Thank's.

Bin Mao · Answer

Problem solved after contacting JIRA support. Quote the response from JIRA support:

"By further investigating this, I was able to understand what's happening: it's not possible to change the assignee when viewing the issues because this field is not available in the Edit screen used in that project, thus it's not possible to do inline edits to change its value. I was able to reproduce the same behaviour in my test instance.
Since you're not an admin of the instance, you won't be able to do the changes necessary to fix this. Please, contact an admin and ask the user to:
• Go to Jira settings > Projects > MyProject > Project Settings > Screens.
• Click on the screen used for the Edit action.
• Add the "Assignee" field to this screen.
• Do the same thing for the all the projects where this is happening.
I believe that you should have no trouble to change the assignee after this!"

Bin Mao · Answer

Yes, I can assign issue in the old view.

Thanks, I'll contact Atlassian.