Error During Saving Config Advanced and Initial

During saving Configuration for Advanced and Initial settings Error is given. Basic Works fine.

Checked the code.

In CounterSettingsAdvanced.php and CounterSettingsInitial.php Change the following lines.

protected function getEditableConfigNames() {
return [
'counter.advanced',
];
}

and

protected function getEditableConfigNames() {
return [
'counter.initial',
];
}

to

protected function getEditableConfigNames() {
return [
'counter.settings',
];
}