Hello, if the doors and windows are only shown as a frame or cannot be placed when inserted, you need to check according to the following steps:

1. Please use Google Chrome. Other browsers may cause the doors and windows not to be displayed;

2. Switch to 2D and check whether the walls are closed or overlapped and whether the interfaces are connected properly;

3. Click on the non-displaying surface to see if you have entered the top wall design and have an extra structural layer. You need to enter the top wall design, right-click on the structural layer - Delete (Please place the doors and windows first before entering the top wall customization)