npm rollbackFailedOptional error when install packages

[mohammad19fff]

I'm opening this issue because:

• npm is producing incorrect or undesirable behavior.

I have a problem when installing any npm packages. here is my error:

rollbackFailedOptional: verb npm-session xxxxxxxxxxx

for resolving this I do some stuff but I still get the same error.

I put registry=http://registry.npmjs.org/ in .npmrc file in my user folder and also run following commands:

npm config rm proxy
npm config rm https-proxy

I try to solve the problem in node 8.11.1 and node 10.1.0 and my npm version is 5.6.0.

Why this problem occurs and how can resolve that?

[legodude17]

Try updating to the latest version of npm.

[mohammad19fff]

@legodude17 But how can I Install the latest version of npm without using npm?

[mohammad19fff]

@legodude17 When I want to install latest npm version I've got this error:

rollbackFailedOptional: verb npm-session xxxxxxxxxxx

[legodude17]

What OS are you running?

[mohammad19fff]

windows 10

[legodude17]

You could try getting the node MSI and using it again.