Fix for Drupal 8 decimal field validation fix re: "invalid number error" addressed here: https://www.drupal.org/node/2230909

Fix for Drupal 8 decimal field validation.php

<?php

function hook_form_BASE_FORM_ID_alter()(array &$form, FormStateInterface $form_state){
        $form['#validate'][] = 'module_remove_decimal_errors';
}

function module_remove_decimal_errors(array &$form, FormStateInterface $form_state) {
        $errorsToRemove = array('field_your_field][0][value','field_your_other_field][0][value');
        $errorsToKeep = array();
        $currentErrors = $form_state->getErrors();
        foreach($currentErrors as $error_key => $errorObject){
            if(!in_array($error_key,$errorsToRemove)){
                $errorsToKeep[$error_key] = $errorObject;
            }
        }
        $form_state->clearErrors();
        foreach($errorsToKeep as $errorKeyToKeep => $errorToKeep){
            preg_match('/^([^\]]*)/',$errorKeyToKeep,$thisErrorFieldName);
            $form_state->setErrorByName($thisErrorFieldName[0], strip_tags($errorToKeep->render()));
        }
}

?>