The Basic Plan or free balance is intended for personal use only. If you want to use it on shared spreadsheets, you need to upgrade your plan.
1. Start the extension via Extensions → Websheet AI → Start
2. Click on the Balance button in the sidebar
3. Choose at least Pro Plan
Choose at least the Pro plan to activate usage on shared spreadsheets.
After 30-40 seconds, you will see changes in Your Balance. Your Balance is used for all your spreadsheets, so there is no need to top up it in every spreadsheet.
4. Ensure that the second checkbox is activated
Ensure the checkbox "Allow access to Your Balance for Smart Formulas in this spreadsheet for both you and other editors," is activated, and click on Apply button
This will provide you, and other Spreadsheet editors access to Your Balance for the Smart Formulas. Other editors can also contribute their balances to the Spreadsheet calculations.