Theme issues, especially with slicers

Hi esmb0303,

Thank you for providing the detailed context and your current theme JSON.

The error message “Style preset not found” typically occurs when the selected visual, such as a slicer, refers to a style preset (like “Default”) that isn’t included in your custom theme file.

To resolve this, define the "Default" style preset under the "stylePresets" section for slicers and make sure your visual is referencing it using "stylePreset": "Default" within the visualStyles block.

Here’s a straightforward solution:

1. Add 
   "stylePreset": "Default",
   inside your visualStyles.slicer["*"].

Then, add a new section for the style preset outside of visualStyles.

"stylePresets": {
"slicer": {
"Default": {
"items": {
"background": { "solid": { "color": "#F8F8F8" } },
"fontColor": { "solid": { "color": "#000000" } },
"textSize": 11
},
"background": {
"show": true,
"color": { "solid": { "color": "#DBDBDB" } },
"transparency": 0
}
}
}
}

This ensures Power BI can find and apply the expected style when rendering slicers.

Thank you.