can´t open ARW-files (RAW)

Hi @Tina23867248w2gx please share your workflow and what you are doing when you see this error.

Please update to: Adobe Photoshop Version: 25.6.0 20240229.m.2527 5f255f1 arm64

Are you able to open your ARW files with Ps release version, is this issue only with Ps beta?

Try resetting Prefs for the Beta:
/Users/yourname/Library/Preferences/ Photoshop Beta Settings (Mac Ventura)
/Users/yourname/Library/Preferences/Adobe\ Photoshop\ \(Beta\)\ Settings (Mac)
C:\Users\user name\AppData\Roaming\Adobe\Adobe Photoshop (Beta)\Adobe Photoshop (Beta) Settings )Win)
Launch BETA Photoshop While Pressing The Keyboard Shortcut
With Photoshop closed, press and hold Shift+Ctrl+Alt (Win) / Shift+Command+Option (Mac) on your keyboard and then Launch Photoshop the way you normally would.
https://helpx.adobe.com/photoshop/using/preferences.html#Manually  

Thanks,

Cory - Photoshop Product Manager