diff --git a/src/ProxyConnector.php b/src/ProxyConnector.php
index 2a87f4e..020e12a 100644
--- a/src/ProxyConnector.php
+++ b/src/ProxyConnector.php
@@ -253,13 +253,19 @@ public function connect($uri)
             $r = new \ReflectionProperty('Exception', 'trace');
             $r->setAccessible(true);
             $trace = $r->getValue($e);
+
+            // Exception trace arguments are not available on some PHP 7.4 installs
+            // @codeCoverageIgnoreStart
             foreach ($trace as &$one) {
-                foreach ($one['args'] as &$arg) {
-                    if ($arg instanceof \Closure) {
-                        $arg = 'Object(' . get_class($arg) . ')';
+                if (isset($one['args'])) {
+                    foreach ($one['args'] as &$arg) {
+                        if ($arg instanceof \Closure) {
+                            $arg = 'Object(' . get_class($arg) . ')';
+                        }
                     }
                 }
             }
+            // @codeCoverageIgnoreEnd
             $r->setValue($e, $trace);
         });