I have written the below apex class to display the lead who are parter

For example if I select the partner lead which is a look up feild as xyz then on account page I shoud be able to see his details I am getting ebelow error

Apex class
public class PartnerLeadController {
    
   public final Account acc;
   
    public PartnerLeadController(ApexPages.StandardController stdController) {
        this.acc = (Account)stdController.getRecord();
        initlead();
    }
    List<Lead> lead;
    
    public void initlead() {
        lead = [select id,OwnerId,Owner.Name,Status,LastName,Name from Lead where Partner_Name__c = : acc.id AND  LeadSource=: 'Partner' ORDER BY Name DESC];
    }
    
    public List<Lead> getlead () {
        return lead;
    }   
    
}
Vf Page

<apex:page standardController="Account" extensions="PartnerLeadController" lightningStylesheets="true" sidebar="false" >
   
    <style>
        body {
       
        }
    </style>
    <apex:pageBlock rendered="true">
        <apex:pageBlockTable value="{!lead}" var="l">
            <apex:column >
                <apex:outputLink value="/Lead/{!l.Id}/view" target="_top">{!l.Name}</apex:outputLink>
                <apex:facet name="header">Lead Name</apex:facet>
            </apex:column>
            <apex:column >
                <apex:outputLink value="/lead/{!l.AccountId}/view" target="_top">{!l.Account.Name}</apex:outputLink>
                <apex:facet name="header">Lead Name</apex:facet>
            </apex:column>
            <apex:column >
                <apex:outputLink value="/{!l.OwnerId}" target="_top">{!l.Owner.Name}</apex:outputLink>
                <apex:facet name="header">Owner Name</apex:facet>
            </apex:column>/>
            <apex:column ><apex:outputField value="{!l.Name}" />
                <apex:facet name="header">Name</apex:facet>
            </apex:column>
            <apex:column ><apex:outputField value="{!l.Status}" />
                <apex:facet name="header">Status</apex:facet>
            </apex:column>

        </apex:pageBlockTable>
    </apex:pageBlock>      
</apex:page>