Not valid JSON error

[flawrist]

OS Windows 7, node 20.2.0, npm 9.9.2.

$ npm install --global is-up-cli
added 89 packages in 16s

$ is-up google.com
RequestError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON in "https://isitup.org/google.com.json"
    at Object.parseBody [as default] (C:\Node\node_modules\is-up-cli\node_modules\got\dist\source\as-promise\parse-body.js:22:15)
    at C:\Node\node_modules\is-up-cli\node_modules\got\dist\source\as-promise\index.js:159:40
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async isUp (file:///C:/Node/node_modules/is-up-cli/node_modules/is-up/index.js:12:36)
    at JSON.parse (<anonymous>)
    at parseJson (C:\Node\node_modules\is-up-cli\node_modules\got\dist\source\index.js:118:35)
    at Object.parseBody [as default] (C:\Node\node_modules\is-up-cli\node_modules\got\dist\source\as-promise\parse-body.js:11:48)
    at C:\Node\node_modules\is-up-cli\node_modules\got\dist\source\as-promise\index.js:159:40
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async isUp (file:///C:/Node/node_modules/is-up-cli/node_modules/is-up/index.js:12:36)
    at async file:///C:/Node/node_modules/is-up-cli/cli.js:23:14