Mail Preference window empty after update to macOS 10.13
After update to macOS High Sierra and when I open the Preferences of Mail the preferences window is empty (see image).
Mail restarted, MacBook restarted but no changes.
Any ideas how to fix it?
MacBook Pro (15-inch, Late 2016), 2,9 GHz Intel Core i7,16 GB 2133 MHz LPDDR3,Intel HD Graphics 530 1536 MB
macOS 10.13 (17A365), Mail Version 11.0 (3445.1.6)
MacBook Pro (15-inch, Late 2016), macOS High Sierra (10.13)