Question about M255dw Color LaserJet Pro - 682021

I got this printer today and wanted to connect it to my iMac (2017 model) with macOS Catalina 10.15.07 via WLAN. It finds it in the settings and when I want to "Add" it, after a while it says: "An error occurred while adding the selected device. Communication with the printer is currently not possible". However, the printer is connected to the WLAN. I was able to install the printer via the USB cable, but the destination would be via WLAN. Many thanks in advance for your help!