- Plesk Onyx for Linux
Note: This article has the reference to the issue with the fix available:
- #EXTDOCKER-23 "Names of environment variables can now contain lowercase letters."
The following error appears in an attempt to create a Docker environment variable with lowercase letters:
PLESK_ERROR: The name of an environment variable can consist solely of uppercase letters, digits, and the underscore ('_'), and cannot begin with a digit.
It is a bug in the product with ID #EXTDOCKER-23 which was fixed in Docker 1.4.0.
Update Docker extension to the newest versions.