Cannot launch Photoshop (adobe_lichelper write permissions error)

Hello Adobe forum,

I am trying to open Photoshop CC 2018 on macOS 10.13.4. I can confirm that I'm signed in in the Creative Cloud menu, that my subscription is up to date, but when I open Photoshop the icon appears and then disappears in my dock without another peep.

When I try opening the app from the terminal, I do see some error messages, but it's unclear to me what I should do next.

$ /Applications/Adobe\ Photoshop\ CC\ 2018/Adobe\ Photoshop\ CC\ 2018.app/Contents/MacOS/Adobe\ Photoshop\ CC\ 2018

2018-05-01 17:56:41.160 Adobe Photoshop CC 2018[32368:3821121] AdobeCrashReporterInitialize: executionTime = 0.009509 seconds

2018-05-01 17:56:42.047 adobe_lichelper[32378:3821359] Created New Secure Note

2018-05-01 17:56:42.065 adobe_lichelper[32378:3821359] Created New Secure Note

2018-05-01 17:56:42.124 adobe_lichelper[32378:3821359] Write failed: Write permissions error.

Thanks,

Dan