Add-ons are customized extensions of G Suite productivity applications such as Gmail, Google Sheets, and Google Docs. Add-ons can add new capabilities to the G Suite applications they extend, help automate tasks, or make third-party services or information available in G Suite. You can see Jivrus add-ons on GSuite Marketplace

Please read the article Install and Uninstall Add-ons for details

This issue can occur if users have logged into multiple Google accounts from the same browser. Mainly if one account has access to your document and other account do not have access.

To resolve this issue:

• Please sign out from Google and sign in with only one Google account

OR

• Use Chrome's incognito window to load the add-on.

The Google Picker Dialog might not open because you have disabled / blocked the cookies option in you browser.

To resolve this issue please follow below steps:

• Click the context menu in the browser toolbar to the right of the address bar.

• Choose Settings.

• Click Cookies and other site data in the Privacy section.

• Ensure that the "Allow all cookies" is checked.

• Now refresh the add-on

Sometimes, the add-on menus do not open fully. This could be due to slow internet connection or having too many add-ons installed.

• Wait a few seconds and Open the add-on.

OR

• Try reloading the document few times

OR

• Try opening the add-on in Chrome's incognito window