To see the error, just use the Power BI embedded demo site and try to set slicer filters. Javascript error below. It didn't work most of last week, but then was working Friday. Now doesn't work aga...
At least temporarily this fixed the issue for me. Basically on the first set if it fails it tries again. I only got the error always on the first try so after that it works.
visual.setSlicerState({
filters: [basicFilter]
}).catch(err => {
visual.setSlicerState({
filters: [basicFilter]
});
});