Datepicker problem in new post admin page

did you try to temporarily switch back to default theme to rule-out any theme conflict issues?

thanks

No, not yet as you do?

I realized that if I use a different theme from Tersus I’m using now, the datapicker works in the administrative part.

If I use the theme Twenty Thirteen in the administrative part datapicker the works …

But I would not use the Twenty Thirteen … : (I would like to use the theme name Tersus

I tried using a plugin that would change the theme of the administrative part, but this did not solve the problem, try to work in this direction.

Excuse me, among other things, I realized now that the theme Tersus no longer exists, but has been modified in Terso https://themeforest.net/item/terso-responsive-wordpress-theme/full_screen_preview/2343187
I try to install and I can tell you … ??

I’d recommend testing by switching to the default theme and deactivating all other plugins, as this sounds like a Javascript conflict issue.