TypeError: Failed to fetch

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Hi,
I try to send an email with a code, but when I press the “send invite” button (aka button 14),
I got: “try to send suggest”
then: “TypeError: Failed to fetch”.
Here’s my code, any idea how to solve it? (or better- how to send email properly?)

thnx!

import {session} from 'wix-storage';
import wixData from 'wix-data';
import wixCrm from 'wix-crm';

$w.onReady( function () {
 //let ravak = session.getItem('ravak_id');
 let ravak2 = "cac037f6-6b72-4c04-a821-7cfc5952ff15";
 let ravak;
 
    $w("#dataset3").onReady(function () { // filter dataset3 to show up the single details. 
        filterEq($w("#dataset3"), "_id", ravak2)
    })
    
    wixData.query("ravakim").eq("_id", ravak2).find().then((result) =>{ // find this sinlge details
        ravak = result.items[0];
        console.log(ravak)

    $w("#dataset2").onReady( function () { //use to filter the matches repeater (the filter not exist yet). 
            console.log(ravak);
            getItem(ravak)
            console.log($w("#dataset2").getTotalCount())
            console.log(ravak._id)
            });
    });
});
function getItem (ravak) {
    console.log(ravak);
    $w('#listRepeater').forEachItem(($item,itemData,index)=>
    {
        $item("#button13").onClick(()=>{ // add to match
            console.log("try to add")
 // $item("#button13").enabled = false;
            $item("#button13").hide();
            $item("#text96").show();
 let match = {
 "title" : ravak.title,
 "singleId":ravak._id,
 "matchId":itemData._id,
 "name":itemData.title,
 "age":itemData.age,
 "haskafa":itemData.pointOfView,
 "height":itemData.height,
 "image":itemData.image,
 "status":itemData.status,
 "aboutMe":itemData.aboutmMe,
            }
            wixData.insert("matchsToTry", match).then((res)=>{
 if(res)
                    console.log("the match add successfully")
                    console.log(res);
            })})     

    $item("#button14").onClick(()=>{ // add to suggestion
        console.log("try to send suggest")
 // $item("#button14").enabled = false;
        $item("#button14").hide();
        $item("#text97").show();
 let suggestion = {
 "name":itemData.title, 
 "age":itemData.age,
 "singleId":ravak._id,
 "haskafa": itemData.pointOfView,
 "image": itemData.image,
 "height": itemData.height,
 "suggestionId":itemData._id,
 "matchMakerId": itemData.shadchanId,
 "mmName": ravak.mmName,
 "reason": " ",
 "status": "פתוחה",
 "commentMm": "להכניס הערת שדכן",
 "title": ravak.title
        }
        wixData.insert("suggestiondata", suggestion).then((res)=>{
            console.log("the suggestion add successfully")
            console.log(res);
            })
//          let a = false
//  if(a){
//      wixCrm.createContact({
//          "firstName":"בדיקה",
//          "lastName": "בדיקה",
//          "emails": ["roipk123@gmail.com"],
//          "phones": ["1521"]
//          })
//          .then((contactId) => { // check this not working!
//              console.log("create contant succeed");
//          })
//          .catch((err) =>{
//                      console.log(err);
//                      });
// }
let userid = "741fc343-e686-4cc0-9168-eb60d8663eb0";
                wixCrm.emailContact('suggestionEmail', userid, {
                    variables: {
                    name:"דוד",
                    link:"https://www.zoog4life.com/suggestion"
                    }}) .then(() =>{
                        console.log("Triggered email sent");
                    })
                    .catch((err) =>{
                        console.log(err);
                        });

                        })})}

async function filterEq (dataset,filerType,item) {
 await dataset.setFilter( wixData.filter()
        .eq(filerType, item));
 //console.log(2);