Hello,
I have installed this module and all options are working Except Fullscreen. When i setup to 100% nothing appears in Google Photos.
If i set resolution manually it works fine. what could be the reason.
Here is the setting.

 sort: "time", //'time', 'reverse', 'random'
    showWidth: "100%", // how large the photo will be shown as. (e.g;'100%' for fullscreen)
    showHeight: "100%",
    originalWidthPx: 1024, // original size of loaded image. (related with image quality)
    originalHeightPx: 768, // Bigger size gives you better quality, but can give you network burden.
    mode: "cover", // "cover" or "contain" (https://www.w3schools.com/cssref/css3_pr_background-size.asp)