Unknown error while using my WixApp.

When I open the site page to which I added an application written using Wix App Builder, i see unknown error. When I delete my application, this error vanishes. I delete all my code, and build application, update him on site, and see again this error.

WixConsole:

Developer Console:

P.s. updating application continuous too long.

// import wixData from 'wix-data';

// const dataBaseName = 'clientBase';

// let client = {
//  name: null,
//  phoneNumber: null,
//  email: null,
//  typeOfActivity: null,
//  aboutMyActivivty: null,
//  sitesTarget: null,
//  advertising: null
// }

// let secondSlidePass, thirdSlidePass, fourthSlidePass, fifthSlidePass = false;

// export function nextButtonOne_click(event) {
//  let radioButtons = $w('#typeOfActivity');
//  if (radioButtons.selectedIndex === 4) {
//      client.typeOfActivity = $w('#input1').value;
 
//  } else {
//      client.typeOfActivity = radioButtons.options[radioButtons.selectedIndex].label;
 
//  }
//  $w('#slideshow1').next()
//  secondSlidePass = true;
// }

// export function typeOfActivity_change(event) {
//  let radioButtons = $w('#typeOfActivity');
//  if (radioButtons.selectedIndex === 4) {
//      $w('#input1').show();
//  }else{
//      $w('#input1').hide();   
//  }
// }

// export function nextButtonTwo_click(event) {
//  let aboutInput = $w('#aboutMe');
//  client.aboutMyActivivty = aboutInput.value;
//  $w('#slideshow1').next();
//  thirdSlidePass = true;
// }

// export function nextButtonThree_click(event) {
//  let checkBox = $w('#checkboxGroup1');
//  client.sitesTarget = '';
//  if (checkBox.selectedIndices.length > 0) {
//      for (var i = 0; i < checkBox.selectedIndices.length; i++) {
//          client.sitesTarget = client.sitesTarget + checkBox.options[checkBox.selectedIndices[i]].label + "; ";
//      }
//  }
//  $w('#slideshow1').next();
//  fourthSlidePass = true;
// }

// export function nextButtonFour_click(event) {
//  let checkBox = $w('#checkboxGroup2');
//  client.advertising = '';
//  if (checkBox.selectedIndices.length > 0) {
//      for (var i = 0; i < checkBox.selectedIndices.length; i++) {
//          client.advertising = client.advertising + checkBox.options[checkBox.selectedIndices[i]].label + "; ";
//      }
//  }
//  $w('#slideshow1').next();
//  fifthSlidePass = true
// }

// let firstName, secondName, phone, email, agree = null

// export function validUserData (event) {
//  firstName = $w('#inputFirstName');
//  secondName = $w('#inputSecondName');
//  phone = $w('#inputNumber');
//  email = $w('#inputMail');
//  agree = $w('#checkboxAgree');
//  if ((firstName && secondName && phone.valid && email.valid) && (agree.selectedIndices[0] === 0)) {
//      $w('#button8').enable();
// } else {
//      console.log(phone.valid, email.valid, agree.selectedIndices)
//  }
// }

// export function submit_click(event) {
//      client.name = firstName.value + ' ' + secondName.value;
//      client.phoneNumber = phone.value;
//      client.email = email.value;
//      console.log(client);

//      //=========!Add client in DataBase!===============

//      wixData.insert(dataBaseName, client);

//      //=========!Add client in DataBase!===============
// }

// export function prewButtonClick(event) {
//  $w('#slideshow1').previous();
// }

// export function toFirstSlide (event) {
//  $w('#slideshow1').changeSlide($w('#slideshowSlide1'));
// }

// export function toSecondSlide (event) {
//  if(secondSlidePass){
//      $w('#slideshow1').changeSlide($w('#slideshowSlide2'));
//  }
// }

// export function toThirdSlide (event) {
//  if(thirdSlidePass){
//      $w('#slideshow1').changeSlide($w('#slideshowSlide3'));
//  }
// }

// export function toFourthSlide (event) {
//  if(fourthSlidePass){
//      $w('#slideshow1').changeSlide($w('#slideshowSlide4'));
//  }
// }

// export function toFifthSlide (event) {
//  if(fifthSlidePass){
//      $w('#slideshow1').changeSlide($w('#slideshowSlide5'));
//  }
// }

You will get better help in the App Builder Forum .

You can also contact the Wix support team to report this issue and get assistance.