CACTI version [1.3.0 - Dev]

The below error occurs when attempting to edit a threshold.

2024-06-26 18:19:34 - PHP ERROR WARNING Backtrace: (D:\cacti\apache\htdocs\cacti\plugins\thold\thold.php[144]:thold_edit(), D:\cacti\apache\htdocs\cacti\plugins\thold\thold.php[2266]:draw_edit_form(), D:\cacti\apache\htdocs\cacti\lib\html_form.php[56]:CactiErrorHandler())

2024-06-26 18:19:34 - ERROR PHP WARNING: Undefined array key "default" in file: D:\cacti\apache\htdocs\cacti\lib\html_form.php on line: 56

Root Cause:
Some hidden config fields do not have array key 'default'
The error occurs at line 56
$field_array['value'] = $field_array['default'];

Solution:
Replace line 56 with:

				//$field_array['value'] = $field_array['default'];
				if (array_key_exists('default', $field_array)) {
					$field_array['value'] = $field_array['default'];
				} else {
					$field_array['value'] = '';
				}