Tempera settings no longer vissible

hello,

Everything worked fine until now..
When I go to Tempera settings my settings are no longer visible. I only get Reset to defaults and Save changes and the right column.
No other settings as I should show.
I removed the template in wp-content/themes/ and uploaded it again but this didn’t solve the problem.
I also disabled all the plugins, this also didn’t help.
Could anyone help me please?

Thanks!