With VIMP 4.1.1 sensitive config database fields are being encrypted. Encryption will not be executed automatically with an update, but has to be performed manually once.
To encrypt those config database fields, execute the following command once after you upgraded from VIMP <=4.1.0 to a version >=4.1.1:
./vimp framework:aesencrypt
Important note:
In VIMP versions lower than 6.x, please use the command ./symfony instead of ./vimp in the code above.
You don't have to do anything with a new installation or a subsequent update to a newer version.