button, you need to allow it to use your clipboard.If your browser blocks your clipboard and disables the Paste Spreadsheet command on the Spreadsheet button, you need to allow it to use your clipboard.
This is only an example and you may need to research or get more help to learn how to do it in your browser.
https://support.mozilla.org/en-US/questions/933841
https://edu.gcfglobal.org/en/chrome/privacy-and-security-in-chrome/1/