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Answer: this may be the restriction that the site adds, and a physical printer must be selected when printing is limited.In this case you can consider the curve solution: pictures corresponding to the coupon will be saved to the local computer, or use the capture function (such as the QQ chat window in the screenshot) the interception into save pictures to a computer for days after printing.
没有配置物理打印机，一些软件的打印功能将无法使用，导致网页无法配置参数文件，然后再安装一个虚拟打印机软件（如Adobe PDF和virtualprinter虚拟打印机）来代替打印参数可以办公软件或其他软件设置正常使用。