WU6 problem on LFSB area

Please tag your post with #pc and/or #xbox.
Are you on Steam or Microsoft Store version?
Are you using Developer Mode or made changes in it?
no dev

Brief description of the issue:
I found an upgrade for WU6, made it, but since then I have no building only the flat terrain. If I go elsewhere for example Rome all is perfect. Before the Upgrade was functioning well

Location of issue:

Any idea ?