Load texture not working in 2020
Mac OS 10.15.1, Illustrator 2020. For years I've used a custom texture (psd file) that I load into texturizer. But since updating to 2020 Illustrator this custom file doesn't work. I upload the texture file, it looks good in the texturizer panel, but when I click OK nothing happens. When I reopen the selection in the texturizer panel it has "canvas" texture. I'm using the same psd file I've always used. Even when I rename it and save it in Photoshop 2020 I have the same problem.

I am happy to share that we have fixed this bug in our latest release – 25.2.3 which is available worldwide now.
Going forward, our goal is to fix as many top User-Voice bugs as possible and as frequently as possible. Given the nature of the fixes, some of the bugs will take a longer time to fix, but we are on it.
You can update to the latest release using Creative Cloud desktop App: https://helpx.adobe.com/in/creative-cloud/help/creative-cloud-updates.html
Thank you for all the feedback. Keep it coming!
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Miles commented
I'm having the same issue. No matter what .psd texture I load in the texturizer panel, when I hit OK it defaults back to canvas texture. It displays correctly in the preview though.