Gradient, colouring and effect-error
The operations weren't particularly complex, a shape won't change fill between gradient, colour or even empty. The appearance panel is empty, and still there's no possible to change or remove the fill. I tried adding a gaussian blur, after which the entire figure disappeared. I thought it might be a preview issue so I exported it, but it was gone there as well. I attach a screenshot. Right before it happened I tried adding a complex clipping mask (but undid it).
![](https://secure.gravatar.com/avatar/2df7b321a0febd2daa854c3d430d613b?size=40&default=https%3A%2F%2Fassets.uvcdn.com%2Fpkg%2Fadmin%2Ficons%2Fuser_70-6bcf9e08938533adb9bac95c3e487cb2a6d4a32f890ca6fdc82e3072e0ea0368.png)
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Next time something like this happens (and if it stays after the file is saved and reopened) — please try to share a copy.
It’s hard to tell anything without steps of a file...
And I suppose after 5 years passed it’s long gone? :/