Use of undefined constant protect_plugin_value_user

When I click the Exclude admin user: to Yes I receive the following php warnings:

Warning Use of undefined constant protect_plugin_value_user – assumed ‘protect_plugin_value_user’ (this will throw an Error in a future version of PHP)
wp-content/plugins/wp-copy-protect-with-color-design/manage/admin.php:129
Plugin: wp-copy-protect-with-color-design

Warning Use of undefined constant protect_plugin_value_user – assumed ‘protect_plugin_value_user’ (this will throw an Error in a future version of PHP)
wp-content/plugins/wp-copy-protect-with-color-design/manage/admin.php:141
Plugin: wp-copy-protect-with-color-design

Warning Use of undefined constant protect_plugin_value_admin – assumed ‘protect_plugin_value_admin’ (this will throw an Error in a future version of PHP)
wp-content/plugins/wp-copy-protect-with-color-design/manage/admin.php:148
Plugin: wp-copy-protect-with-color-design

Notice Undefined index: Protect_Copy_save
wp-content/plugins/wp-copy-protect-with-color-design/manage/admin.php:28
Plugin: wp-copy-protect-with-color-design

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