REPORT-91839 模板版本管理二期 偶遇报错，不确定场景，加一下处理

designer-base/src/main/java/com/fr/design/mainframe/vcs/common/VcsHelper.java

@@ -79,7 +79,12 @@ public class VcsHelper implements JTemplateActionListener {
         VcsOperator op = WorkContext.getCurrent().get(VcsOperator.class);
         // 开了设计器启动页面时一开始取不到VcsOperator，通过下面的切换环境事件再取，这边判断下
         if (op != null) {
-            legacyMode = op.isLegacyMode();
+            try {
+                legacyMode = op.isLegacyMode();
+            } catch (Exception e) {
+                legacyMode = true;
+                FineLoggerFactory.getLogger().error("[VcsHelper] get legacy first failed ", e.getMessage());
+            }
         }
         EventDispatcher.listen(ConfigEvent.READY, new ListenerAdaptor() {
             @Override