I ran a test and removed the Visustela plugin that modifies the gauge. And your plugin worked. Strange, because the previous version of your plugin is compatible with Visustela Gauge.
If it's not too much trouble. I hope I'm not bothering you, as I use this option and my image has transparency. I'd like to remove the black background when opening the menu, as it prevents the transparency from being visible. And about the Visustela plugins, I'd still like to use them, but if that's not possible, between your plugin and Visustela Gauge, I prefer yours.
If I select the "none" option, the entire background turns black, making it appear as if my image is not transparent.Thank you for your support. My menu is looking great thanks to your plugin.