From 9da415d7366375458eacd1d16b2e23f7182108c6 Mon Sep 17 00:00:00 2001
From: Thomas Peterson <info@thomas-peterson.de>
Date: Thu, 23 Mar 2023 19:58:17 +0100
Subject: [PATCH] Fix Valid.php

---
 src/Calc/Valid.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Calc/Valid.php b/src/Calc/Valid.php
index 08851f2..1267559 100644
--- a/src/Calc/Valid.php
+++ b/src/Calc/Valid.php
@@ -92,7 +92,7 @@ class Valid
                     }
 
                     if($option instanceof Checkbox) {
-                        if (isset($this->engine->getVariables()[$option->getId()]) && in_array($opt->getId(), $this->engine->getVariables()[$option->getId()])) {
+                        if (isset($this->engine->getVariables()[$option->getId()]) && is_array($this->engine->getVariables()[$option->getId()]) && in_array($opt->getId(), $this->engine->getVariables()[$option->getId()])) {
                             $opt->setIsSelected(true);
                         } else {
                             $opt->setIsSelected(false);