i am receiveing this error

This page has an error. You might just need to refresh it. Unable to find action 'getBoatTypes' on the controller of c:BoatSearchForm Failing descriptor: {c:BoatSearchForm}

here are the relative components

boatSearchForm.cmp

<aura:component controller="BoatSearchFormApexController" implements="force:appHostable,flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId" access="global">
    
    <aura:attribute name="selectType_boat_attribute" type="String[]" default="All Types"/>
    <aura:attribute name="newBtnShow" type="boolean"/>
    
    <aura:registerEvent name="startBoatForm" type="c:startBoatForm"/>
    <aura:handler name="init" value="{!this}" action="{!c.doInit}"/>
    <aura:handler name="startBoatForm" event="c:startBoatForm" action="{!c.handleBoatForm}"/>
    
    
    <lightning:layout horizontalAlign="center" VerticalAlign="end">
        
        <lightning:layoutItem flexibility="auto" padding="around-small"> 
            <lightning:select aura:id="selectTypeBoat"  name="selectType" label="">
                <option value="">All Types</option>
                <aura:iteration items="{!v.selectType_Boat_attribute}" var="option">
                    <option value="!option" text="!option"/>
                </aura:iteration>
            </lightning:select>
        </lightning:layoutItem>
    
        <lightning:layoutItem flexibility="auto" padding="around-large">
            <lightning:button label="search" variant="brand" onclick="{!c.boatSearch}"/>
        </lightning:layoutItem>
        
        <aura:if isTrue="{!v.newBtnShow}">
        <lightning:layoutItem flexibility="auto" padding="around-large">
            <lightning:button label="new" variant="neutral" onclick="{!c.newBtnClick}"/>
        </lightning:layoutItem>
        </aura:if>
      
    </lightning:layout>
    
</aura:component>


boatSearchFormController.js

({
    doInit : function(component, event, helper) {
          alert('---->');
        var action = component.get("c.getBoatTypes");
        action = setCallback(this, function(response){
            var state = response.getState;
            $A.log(response);
            if(state === "success"){
                component.set("v.selectType_boat_attribute", response.getReturnValue());
            }
        });
        $A.enqueueAction(action);
        var isEnabled = component.get("e.force:createRecord");
          //check if isEnabled is true
          if (isEnabled) {
            component.set("v.newBtnShow", true);
          }
        
    }
})


boatSearchFormApexController.apxc

public with sharing class BoatSearchFormApexController 
{
    public static list<BoatType__c> getBoatTypes()
    {
         return [Select Id, Name from BoatType__c];
    }
}


boatSearch.cmp

<aura:component implements="force:appHostable,flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId" access="global">
    <lightning:card class="slds-m-bottom_x-small" title="Find a Boat">
        <c:BoatSearchForm/>
    </lightning:card>
    
    <lightning:card class="slds-m-bottom_x-small" title="Matching Boats">
        <c:BoatSearchResults/>
    </lightning:card>
</aura:component>


FriendsWithBoats.app

<aura:application extends="force:slds">
    <c:BoatSearch/>
</aura:application>