diff --git a/libraries/classes/Export.php b/libraries/classes/Export.php
index ec14ddf8fd..b2b13aaa72 100644
--- a/libraries/classes/Export.php
+++ b/libraries/classes/Export.php
@@ -841,6 +841,11 @@ class Export
                 $tableObj = new Table($table, $db);
                 $nonGeneratedCols = $tableObj->getNonGeneratedColumns(true);
 
+                // Skip tables that cannot be read
+                if ($nonGeneratedCols === []) {
+                    continue;
+                }
+
                 $localQuery = 'SELECT ' . implode(', ', $nonGeneratedCols)
                     . ' FROM ' . Util::backquote($db)
                     . '.' . Util::backquote($table);
@@ -1110,6 +1115,11 @@ class Export
                 $tableObj = new Table($table, $db);
                 $nonGeneratedCols = $tableObj->getNonGeneratedColumns(true);
 
+                // Skip tables that cannot be read
+                if ($nonGeneratedCols === []) {
+                    return;
+                }
+
                 $localQuery = 'SELECT ' . implode(', ', $nonGeneratedCols)
                     . ' FROM ' . Util::backquote($db)
                     . '.' . Util::backquote($table) . $addQuery;