Example code not working

[BodukGenius]

Example code not working.

ERROR in Error: ENOENT: no such file or directory, open 'C:\s\r\ProjectX\unpkg.com\react@16.14.0\umd\react.production.min.js'

• node:fs:585 Object.openSync
  node:fs:585:3

• node:fs:453 Object.readFileSync
  node:fs:453:35

• plugin.js:220 Plugin.processTag
  [WebPackTest]/[webpack-subresource-integrity]/plugin.js:220:78

• plugin.js:261
  [WebPackTest]/[webpack-subresource-integrity]/plugin.js:261:40

• Array.forEach

• plugin.js:261 Plugin.handleHwpBodyTags
  [WebPackTest]/[webpack-subresource-integrity]/plugin.js:261:18

• index.js:109
  [WebPackTest]/[webpack-subresource-integrity]/index.js:109:28

• new Promise