Error 413. Can not find the closing line </SimBase.Document>

[tsGucci]

Error 413. Can not find the closing line </SimBase.Document> in dll.xml! Your dll.xml may be corrupted or it is not in the right structure!
Edit your dll.xml by hand, shift the </SimBase.Document> line to a new separate line and re-run the activator.

The activator could find the dll.xml but the last line which should be </SimBase.Document> do not. Open your dll.xml with Notepad and check the file. The </SimBase.Document> may be there but not in a separate line. It should be separate line at the end of the file. Correct the dll.xml and save it.
If done please re-run the LHBP_Activator.exe (You can find it [FSX root folder]\Addon Scenery\LHS_LHBP_X\LHBP_Activator.exe

You may use the FSX DLL.XML Viewer and Repair Utility from flight1 to edit your dll.xml. You can find it here: https://www.flight1.com/view.asp?page=library