Can't create new category

I Have a new Discourse install on an Ubuntu host, installed through the docker image.
I am admin on Discourse and checked the default locale is set to English.
When I enter category mode, I do see the hamburger icon. When I click the hamburger icon I get the + create category button. But when I click that button, nothing happens.
Any hints and tips to troubleshoot this?

Update to latest.


@Michael thnx for the quick response. I will ask the sysadmin if he can roll out that fix. Currently I have no terminal/SSh access to the machine where the forums are running…

update is running. I will try as soon the update has been applied

/edit: update fixed this issue. Thx again for the support