My landing page in Classic is a VisualForce page.  I have Lightning Experience enabled.  When I'm on the landing page in Classic and I click my name then "Switch to Lightning Experience", the page goes nowhere.  However, when I go to a standard tab, like Opportunities, then click "Switch to Lightning Experience", it works just fine.  This is affecting all users in my org.

Any idea what might be going wrong?

I'll paste my VF page code below, but there's no reason why it should affect this.
 

<apex:page controller="ChartClass" title="Metrie Home Page" readonly="true">
    
    <apex:sectionHeader title="Metrie Home Page" subtitle="">
        <apex:panelGrid columns="1" width="100%">
            <c:NewsTicker />
        </apex:panelGrid>
        <apex:outputText value="Viewing {0}" style="font-size:22px;font-weight:bold;">
            <apex:param value="{!chartScope}"/>
        </apex:outputText>
    </apex:sectionHeader>
    
    <apex:panelGrid columns="2">
        
        <apex:panelGrid columns="1">
            
            <apex:panelGrid columns="3" width="100%">
                <c:MetrieNewsComponent />
                <c:MetrieHomePageComponent />
                <c:GamificationComponent />
            </apex:panelGrid>
            
            <apex:panelGrid columns="3" width="100%">
                <apex:panelgroup >
                    <c:Top10OpenOppsList />
                </apex:panelgroup>
                <apex:panelgroup >
                    <c:Top10CasesList />
                    <c:OpenCasesComponent />
                </apex:panelgroup>
                
                <apex:panelgroup >
                    <c:OpenTaskComponent />
                    <a href="/007">Click here for more open Tasks</a>
                </apex:panelgroup>
            </apex:panelGrid>
        </apex:panelGrid>

        

        <apex:panelGrid columns="1" width="100%" >            
            <apex:outputPanel layout="block" style="overflow:auto;width:500px;height:667px" >
                <chatter:newsfeed />
            </apex:outputPanel>
        </apex:panelGrid>
    </apex:panelGrid>
    
</apex:page>