Hello friends!

I cannot get this visualforce component to save. After trying a lot of different things in setting the properties i still get the error: Unknown property 'SObject.' on line 0.

Any guidance is greatly appreciated.

<apex:component controller="pdf_QLineItemGrouped2">

	<apex:attribute name="qlis" required="true" type="QuoteLineItem[]" assignTo="{!qli}" description="List of quote line items to be displayed."/>
    <apex:attribute name="totalPrice" required="true" type="Decimal" description="Quotes total sales price"/>
     <section >
         <b></b>
         <table class="qitable">
             <tr>
                 <th class="row-name label" >Product</th>
                 <th class="row-date label">Description</th>
                 <th class="row-date label">Quantity</th>
                 <th class="row-status label">CPI</th>
                 <th class="row-status label">Total</th>
             </tr>
             
             <apex:repeat var="qli" value="{!groupedQLIs}">
                 
                 <tr>
                     <td class="row-name detail" >{!qli.['Family']}</td>
                     <td class="row-name detail" >{!qli['Quantity']}</td>
                     <td class="row-date detail">
                         <apex:outputText value="{0, number,currency}">
                             <apex:param value="{!qli.['Amount']}"/>
                         </apex:outputText>
                     </td>
                     <td class="row-date detail">
                         <apex:outputText value="{0, number,currency}">
                             <apex:param value="{!qli.TotalPrice}"/>
                         </apex:outputText>
                     </td>
                 </tr>
             </apex:repeat> 
             <tr class="label">
                 <td colspan="4" class="alignRight">Total:</td>
                 <td>
                     <apex:outputText value="{0, number,currency}">
                         <apex:param value="{!totalPrice}"/>
                     </apex:outputText>
                 </td>
             </tr>
         </table>
         <p style="page-break-after: always">Please note that prices do not include GST.</p>
    </section>

</apex:component>

public class pdf_QLineItemGrouped2 {
	
    public pdf_QLineItemGrouped2(){}
   public list<QuoteLineItem> qli {get; set;}
   set<Id> qlids = (new Map<Id, QuoteLineItem>(qli)).keySet(); 
   public list<SObject> groupedQLIs {
       get {return groupedQLIs;} 
       private set{
           groupedQLIs = [SELECT 
                       PricebookEntry.Product2.Family Family, 
                       SUM(Quantity) Quantity, 
                       SUM(CG_Total_Price__c) Amount
                       FROM QuoteLineItem
                       WHERE Id IN :qlids AND UnitPrice > 0
                       GROUP BY PricebookEntry.Product2.Family
                       ORDER BY PricebookEntry.Product2.Family ASC];
       }}
}