Why my chagrin with German web sites? In a contact form, I tried to explain a problem with another form of the provider. And typed in their URL. Oh noes. Special characters are not allowed! So I had to spell out https Doppelpunkt Schrägstrich Schrägstrich etc. And I tried to attach the PDF they sent me. It was not to be. File name (their choice, Leuchtenberger Kirchweg47B_20260908_Unser\ Angebot_VK20102356538.pdf) more than 50 characters.