You may get the following error when you do yo @microsoft/sharepoint

> [email protected] install C:\Users\chakkaradeep\apps\helloworld-webpart\node_modules\bufferutil
> node-gyp rebuild

MSBUILD : error MSB4132: The tools version "2.0" is unrecognized. Available tools versions are "4.0".

While the console reports an error, it is safe to ignore this error. The dependency bufferutil tries to use MSBUILD to compile their tools and if not available, it uses its JavaScript tool instead, though it gives you an error.

In Windows, you may get the following error:

Failed at the [email protected] install script 'node install.js'.

This is because phantomjs is not able to find python to run the script. To fix this issue, you will need to add python directory and the python scripts directory to the PATH system environment variable and then close and reopen a new console session. For example, the python folder will be where you installed python c:\python and the scripts folder then will be c:\python\scripts

If you are using a linux OS, such as Ubuntu or Fedora, you might encounter the following error when you gulp serve:

[20:59:42] Error - typescript - node_modules/@microsoft/sp-client-base/lib/index.d.ts(37,70): error TS2307: Cannot find module './odataTypes/IOdataNavigationNodeCollection'.
[20:59:42] Error - typescript - node_modules/@microsoft/sp-client-base/lib/index.d.ts(38,38): error TS2307: Cannot find module './odataTypes/IOdataWeb'.
[20:59:42] Error - typescript - node_modules/@microsoft/sp-client-preview/lib/local/bundles/platform-exports.d.ts(37,73): error TS2307: Cannot find module '../clientSideWebParts/propertyPane/propertyPaneFields/propertyPaneDropDown/IPropertyPaneDropdown'.
[20:59:42] Error - typescript - node_modules/@microsoft/sp-client-preview/lib/local/bundles/platform-exports.d.ts(38,38): error TS2307: Cannot find module '../clientSideWebParts/propertyPane/propertyPaneFields/propertyPaneDropDown/PropertyPaneDropDown'.
[20:59:42] Error - typescript - node_modules/@microsoft/sp-client-preview/lib/local/bundles/platform-exports.d.ts(47,39): error TS2307: Cannot find module '../clientSideWebParts/propertyPane/propertyPaneFields/PropertyPaneTextField/PropertyPaneTextField'.
[20:59:42] Error - 'typescript' sub task errored after 2.47 s 
 "TypeScript error(s) occurred."

This is due to a bug in the preview builds. You can use the following workaround to overcome this issue:

In @microsoft/sp-client-base/lib/index.d.ts, change:

./odataTypes/IOdataNavigationNodeCollection => ./odataTypes/IODataNavigationNodeCollection

./odataTypes/IOdataWeb => ./odataTypes/IODataWeb

In @microsoft/sp-client-preview/lib/local/bundles/platform-exports.d.ts, change:

../clientSideWebParts/propertyPane/propertyPaneFields/propertyPaneDropDown/IPropertyPaneDropdown => ../clientSideWebParts/propertyPane/propertyPaneFields/propertyPaneDropdown/IPropertyPaneDropdown

../clientSideWebParts/propertyPane/propertyPaneFields/propertyPaneDropDown/PropertyPaneDropDown => ../clientSideWebParts/propertyPane/propertyPaneFields/propertyPaneDropdown/PropertyPaneDropdown

../clientSideWebParts/propertyPane/propertyPaneFields/PropertyPaneTextField/PropertyPaneTextField => ../clientSideWebParts/propertyPane/propertyPaneFields/propertyPaneTextField/PropertyPaneTextField