We’re having an issue following the tutorials for creating workflows and tabs.
Here’s our code, if you can help that would be amazing.

functions.php in themes folder:

/**
 * Registering Piklist plugin
 */
  add_filter('piklist_admin_pages', 'piklist_theme_setting_pages');
  function piklist_theme_setting_pages($pages)
  {
     $pages[] = array(
      'page_title' => __('Cabinet Door Shop')
      ,'menu_title' => __('Cabinet Door Shop', 'CDS')
      ,'capability' => 'manage_options'
      ,'menu_slug' => 'custom_settings'
      ,'setting' => __('my_theme_settings')
      ,'menu_icon' => plugins_url('piklist/parts/img/piklist-icon.png')
      ,'page_icon' => plugins_url('piklist/parts/img/piklist-page-icon-32.png')
      ,'single_line' => true
      ,'default_tab' => 'Materials'
      ,'save_text' => 'Save Door Settings', 'Save CDS'
  );
 
    return $pages;
  }

my-setting-page:

<?php
/*
 Title: Materials
 Order: 10
 Tab: Materials
 Setting: my_theme_settings
 Flow: Workflow
 
 */
piklist('field', array(
  'type' => 'text'
  ,'field' => 'text'
  ,'label' => 'My NEW Door Style'
  ,'description' => 'Door Style Name'
  ,'help' => 'Tell us the door style.'
  ,'value' => 'RP-10'
  ,'attributes' => array(
  'class' => 'text'
  )
 ));
 
piklist('field', array(
 'type' => 'select'
 ,'field' => 'select 123'
 ,'label' => 'Select Box'
 ,'description' => 'Choose from the drop-down.'
 ,'help' => 'This is help text.'
 ,'attributes' => array(
 'class' => 'text'
 )
 ,'choices' => array(
   'option1' => 'Option 1'
   ,'option2' => 'Option 2'
   ,'option3' => 'Option 3'
 )
 ));
 
 piklist('field', array(
  'type' => 'text'
  ,'field' => 'text'
  ,'label' => 'My NEW Door Style'
  ,'description' => 'Door Style Name'
  ,'help' => 'Tell us the door style.'
  ,'value' => 'RP-10'
  ,'attributes' => array(
  'class' => 'text'
  )
 ));
 
piklist('field', array(
 'type' => 'colorpicker'
 ,'field' => 'colorpicker 123'
 ,'label' => 'Choose a color'
 ,'value' => '#aee029'
 ,'description' => 'Click in the box to select a color.'
 ,'help' => 'This is help text.'
 ,'attributes' => array(
  'class' => 'text'
 )
 ));
 
 piklist('field', array(
 'type' => 'select'
 ,'field' => 'select 456'
 ,'label' => 'Select Box'
 ,'description' => 'Choose from the drop-down.'
 ,'help' => 'This is help text.'
 ,'attributes' => array(
 'class' => 'text'
 )
 ,'choices' => array(
   'option1' => 'Option 1'
   ,'option2' => 'Option 2'
   ,'option3' => 'Option 3'
 )
 ));
 
 piklist('field', array(
 'type' => 'colorpicker'
 ,'field' => 'colorpicker'
 ,'label' => 'Choose a color'
 ,'value' => '#aee029'
 ,'description' => 'Click in the box to select a color.'
 ,'help' => 'This is help text.'
 ,'attributes' => array(
  'class' => 'text'
 )
 ));

my-setting-page1

<?php
/*
 Title: Panels
 Order: 30
 Tab: Panels
 Setting: my_theme_settings
 Flow: Workflow
 
 */
piklist('field', array(
  'type' => 'text'
  ,'field' => 'text'
  ,'label' => 'My NEW Door Style'
  ,'description' => 'Door Style Name'
  ,'help' => 'Tell us the door style.'
  ,'value' => 'RP-10'
  ,'attributes' => array(
  'class' => 'text'
  )
 ));
 
piklist('field', array(
 'type' => 'select'
 ,'field' => 'select 123'
 ,'label' => 'Select Box'
 ,'description' => 'Choose from the drop-down.'
 ,'help' => 'This is help text.'
 ,'attributes' => array(
 'class' => 'text'
 )
 ,'choices' => array(
   'option1' => 'Option 1'
   ,'option2' => 'Option 2'
   ,'option3' => 'Option 3'
 )
 ));
 
 piklist('field', array(
  'type' => 'text'
  ,'field' => 'text'
  ,'label' => 'My NEW Door Style'
  ,'description' => 'Door Style Name'
  ,'help' => 'Tell us the door style.'
  ,'value' => 'RP-10'
  ,'attributes' => array(
  'class' => 'text'
  )
 ));
 
piklist('field', array(
 'type' => 'colorpicker'
 ,'field' => 'colorpicker 123'
 ,'label' => 'Choose a color'
 ,'value' => '#aee029'
 ,'description' => 'Click in the box to select a color.'
 ,'help' => 'This is help text.'
 ,'attributes' => array(
  'class' => 'text'
 )
 ));
 
 piklist('field', array(
 'type' => 'select'
 ,'field' => 'select 456'
 ,'label' => 'Select Box'
 ,'description' => 'Choose from the drop-down.'
 ,'help' => 'This is help text.'
 ,'attributes' => array(
 'class' => 'text'
 )
 ,'choices' => array(
   'option1' => 'Option 1'
   ,'option2' => 'Option 2'
   ,'option3' => 'Option 3'
 )
 ));
 
 piklist('field', array(
 'type' => 'colorpicker'
 ,'field' => 'colorpicker'
 ,'label' => 'Choose a color'
 ,'value' => '#aee029'
 ,'description' => 'Click in the box to select a color.'
 ,'help' => 'This is help text.'
 ,'attributes' => array(
  'class' => 'text'
 )
 ));

workflow.php

<?php
/*
Flow: Workflow
Page: custom_settings.php
Header: true
Position: title
*/

panels-tab.php

<?php
/*
Title: Panels
Order: 30
Flow: Workflow
*/

materials-tab.php

<?php
/*
Title: Materials
Order: 10
Flow: Workflow
*/

Let me know if you need additional information
Thanks.