Need help upgrading to Ghost 2

[Carlos_Ribeiro]

I followed the instructions on the documentation but ran into the following issue which I believe it might be easy to be solved, but I am not a developer.

Checking system Node.js version
Ensuring user is not logged in as ghost user
Checking if logged in user is directory owner
Checking current folder permissions
Checking folder permissions
Checking file permissions
Checking content folder ownership
Checking memory availability
Checking for available migrations
Checking for latest Ghost version
A ProcessError occurred.

Message: Command failed: yarn info ghost versions --json
{“type”:“error”,“data”:“An unexpected error occurred: "EACCES: permission denied, scandir ‘/home/alex/.config/yarn/link’".”}

{“type”:“info”,“data”:“If you think this is a bug, please open a bug report with the information provided in "/var/www/ghost/yarn-error.log".”}
{“type”:“info”,“data”:“Visit yarn info | Yarn for documentation about this command.”}

Exit code: 1

Debug Information:
OS: Ubuntu, v16.04
Node Version: v6.14.3
Ghost-CLI Version: 1.8.1
Environment: production
Command: ‘ghost update’

[Carlos_Ribeiro]

I solved partially the issue falling into a different problem

Checking system Node.js version
Ensuring user is not logged in as ghost user
Checking if logged in user is directory owner
Checking current folder permissions
Checking folder permissions
Checking file permissions
Checking content folder ownership
Checking memory availability
Checking for available migrations
Checking for latest Ghost version
Downloading and updating Ghost to v2.1.4
A SystemError occurred.

Message: Ghost v2.1.4 is not compatible with this version of the CLI.

Debug Information:
OS: Ubuntu, v16.04
Node Version: v6.14.3
Ghost-CLI Version: 1.8.1
Environment: production
Command: ‘ghost update’

[Carlos_Ribeiro]

I run npm install -g ghost-cli@latest
then I get this
/usr/bin/ghost -> /usr/lib/node_modules/ghost-cli/bin/ghost
/usr/lib
└── ghost-cli@1.9.4
and finally when running the command ghost update it gives the same error Message: Ghost v2.1.4 is not compatible with this version of the CLI.