Check if global class file still exists before registering it

core/script_language.cpp

@@ -33,6 +33,7 @@
 #include "core/core_string_names.h"
 #include "core/debugger/engine_debugger.h"
 #include "core/debugger/script_debugger.h"
+#include "core/os/file_access.h"
 #include "core/project_settings.h"
 
 #include <stdint.h>
@@ -162,7 +163,7 @@ void ScriptServer::init_languages() {
 
 			for (int i = 0; i < script_classes.size(); i++) {
 				Dictionary c = script_classes[i];
-				if (!c.has("class") || !c.has("language") || !c.has("path") || !c.has("base")) {
+				if (!c.has("class") || !c.has("language") || !c.has("path") || !FileAccess::exists(c["path"]) || !c.has("base")) {
 					continue;
 				}
 				add_global_class(c["class"], c["base"], c["language"], c["path"]);