Wlan problems with Huawei p20?

Today my new mobile arrived and I wanted to set everything up, but I have via the WLAN no Internet access, although when connecting to this no error message or similar. Occurred. About my old mobile phone, the WLAN works fine. Does anyone have an idea why this could be, or how to fix the problem?

Mostly no error messages appear. Delete the WLAN again from your saved networks and enter the password again. Mostly it's done with it.

Thanks for the tip, does not work for me unfortunately.