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Can't install plugins in Photoshop

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When I go to Manage Plugins, I can see only grayed-out items. When I try to install a new plugin, I get an error "Could not install plugin. Error code -20". Re-installing Cretive Cloud did not help. This happens on a Mac Powerbook, Intel-based. On my Windows system it works fine. Help needed how to resolve this.

macOS

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stefan.gCorrect answer

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Yes, my browser supports TLS 1.2 and 1.3. I suspect it could be some path/directory permission or not available issue, but I do not know which path it is supposed to access for the plugins.

The problem was resolved by a clean reinstall of Mac OS and then CC and PS. Reisntalling just CC/PS was not sufficient.

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@stefan.g Have you tried signing out and signing back into the Creative Cloud app

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@Ged_Traynor, i think you are correct. this person is having a problem with their cc app.

that error code is a path issue with the plugin installer.

@stefan.g, are you trying to install "easy panel"?

and, no matter which plugin you're trying, if signing out/in (per @Ged_Traynor) doesn't help, reset the cc desktop app:

make sure it's in the foreground, then press:

Win: Ctrl + Alt + R
Mac: Cmd + Opt + R

if that fails, restart your computer and retry installing.

<moved back to cc services>

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Neither of these helped - signing out/in, restart computer, reinstalling cc and ps, reseting the cc desktop app.

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<moved from cc services>

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@kglad I can't see how this is a Photoshop issue, nothing in the screenshots suggest it's Photoshop related

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@Ged_Traynor, the op's title: Can't install plugins in Photoshop

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