Hallo,
es gibt 2 Lösungsansätze:
1:
Also, as a workaround, please try to Disable the sandbox feature in Acrobat (under Preferences > Security (Enhanced) > Enable Protected Mode at startup (Preview)). In the case of empty Profiles (or generally), it is advisable to remove the Preflight preferences (%APPDATA%\Adobe\Acrobat\Preflight Acrobat Continuous) to get fresh libraries/profiles after the sandbox is disabled.
Note: keep a backup of the folder before removing it from AppData, as any custom profiles might get lost during the removing/renaming of folders.
2: das hat bei mir geholfen, direkt in der Preflight-Palette von Acrobat:
I solve the issue by importing Preflight profiles. Go to "Option" for preflight and select for "Import Preflight Profile". A new window will be opened to select the path, then use this path "Program Files\Adobe\Acrobat DC\Acrobat\plug_ins\Preflight" and find "Default.kfp. It will bring back all the missing default profiles.
Gruß
als Antwort auf: [#589649]