No longer functioning

Recently, this plugin has stopped working as intended. I have never had issues with it over the years, but now I cannot get it to function correctly at all.

The first new issue that seems to have arisen is that this plugin now conflicts with my theme’s core plugin, the “GoodLayers Core” plugin for the Inifinite theme by GoodLayers. The button to choose an icon no longer appears on the Menu editor in Appearance > Menus.

See screenshot: https://pasteboard.co/0OHT5LyP1i99.png

I can tell that these two plugins are conflicting because when I turn off the GoodLayers Core plugin, the button for selecting an icon from this plugin reappears. This is weird, because this plugin has never conflicted with this theme before for the many years I have been using these two plugins together. However, even once the button for selecting an icon successfully reappears with the theme plugin deactivated, none of the settings in the “Menu Icon Settings” interface actually affect the SVG icon that appears next to the menu item. The icon just stays tiny regardless of what settings I enter into the Menu Icon Settings

See screenshot of settings: https://pasteboard.co/uBrkqMCsVv60.png
See screenshot of menu item with those settings: https://pasteboard.co/J7pfmPsFBKwr.png
See screenshot of the SVG image that is being used in the menu: https://pasteboard.co/eikrkuRWNrlI.png

So even with or without my theme plugin conflicting, the Menu Icons plugin does not work correctly.

The page I need help with: [log in to see the link]