From 957a2fa1714222e07c0ddfea979d9f8ec4457045 Mon Sep 17 00:00:00 2001
From: Yuri Kuznetsov <yurikuzn@users.noreply.github.com>
Date: Mon, 28 Nov 2022 17:06:30 +0200
Subject: [PATCH] fix upgrade

---
 application/Espo/Core/Console/Commands/Upgrade.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/application/Espo/Core/Console/Commands/Upgrade.php b/application/Espo/Core/Console/Commands/Upgrade.php
index a6390d67f7..1aead14d28 100644
--- a/application/Espo/Core/Console/Commands/Upgrade.php
+++ b/application/Espo/Core/Console/Commands/Upgrade.php
@@ -371,7 +371,7 @@ class Upgrade implements Command
                 }
                 catch (Throwable) {}
 
-                throw new Error($shellResult ?? 'Unknown error on shell_exec.');
+                throw new Error($shellResult ?: 'Unknown error on shell_exec.');
             }
         }
     }