I cannot create folder in Lightroom Classic Library Module

Dear Community members,

I do not know what happened, I cannot create folder at Library module's folder panel. I created before but for the time being I cannot. I will most appreciate if you help where I am doing wrong.

I use created folder to put Raw file before sending to Topaz Denoise AI. 

Thanks and regards.

Lightroom V. 11.3.1 Apple

OS version : Monterey 12.3.1

Umit Ozgen 

ozgenumit01@gmail.com