Fatal error: Unknown

Hi,

Great plugin that has improved my Page Speed score.

However, I do have 2 problems while using this plugin.

When i run Google Pagespeed, i get these 2 problems.

1) I get this “Fatal Error. Unknown…”

Use legible font sizes
The following text on your page renders in a way that may be difficult for some of your visitors to read. Use legible font sizes to provide a better user experience.
The following text fragments have a small font size. Increase the font size to make them more legible.

2) Configure the viewport

Your page does not have a viewport specified. This causes mobile devices to render your page as it would appear on a desktop browser, scaling it down to fit on a mobile screen. Configure a viewport to allow your page to render properly on all devices.

How do i solve these 2 problems?

https://ww.wp.xz.cn/plugins/autoptimize/