where can I find /packages/accounts-ui-unstyled/login_buttons.js

when I run my meteor application I get this error

   => Errors prevented startup:
While computing assigned variables:

   /packages/accounts-ui-unstyled/login_buttons.js: Unexpected token (164:0)

=> Your application has errors. Waiting for file change.

where can I find this path:


I found login_buttons.js through this path :

although these two paths are not the same as mentioned in the error message

The path leads to a package. Here is the link to it on github. https://github.com/meteor/meteor/blob/devel/packages/accounts-ui-unstyled/login_buttons.js