Hi there n28testuser1-gma,
It's vital that all your transactions be entered in your books correctly so your account balances can be accurate. QuickBooks Online is a great tool able to help you keep track of expenses and sales to see your profits. I can point you in the right direction to get rid of this error.
One of the things listed in the error message was made inactive and must be reactivated in order to finish setting up the transaction. Here are some steps to reactivate each of the types of items listed:
Accounts
1. Click on the Gear in the top right and open the Chart of accounts
2. Select the small Gear above the Action column
3. Check the box to Include inactive
4. Scroll through the list of accounts and hit Make active as you see fit
Customers
1. Click on the Sales tab, then Customers
2. Select the small Gear above the Action column
3. Check the box to Include inactive
4. Scroll through the list of customers and hit Make active as you see fit
Suppliers
1. Click on the Expenses tab, then Suppliers
2. Select the small Gear above the Action column
3. Check the box to Include inactive
4. Scroll through the list of suppliers and hit Make active as you see fit
Products and services
1. Click on the Sales tab, then Products and services
2. Select the small Gear above the Action column
3. Check the box to Include inactive
4. Scroll through the list of items and hit Make active as you see fit
Once the affected item is made active once more, the transaction should be able to be saved.
If you have any other questions, feel free to reach out here.