Thanks for those files. It works on my machine as well.
 
	 
 
	Here is a new version of the code. The angle of the block is now translated to the heading in SV.
 
	The code assumes a (static) block containing an arrow pointing east. 
 
(vl-load-com)
(defun KGA_Math_LimitAngleRange (ang)
  (rem (+ (rem ang (+ pi pi)) pi pi) (+ pi pi))
)
(defun KGA_Math_Rad_To_Dgr (rad)
  (* (/ rad pi) 180.0)
)
(defun KGA_Sys_Apply (expr varLst / ret)
  (if (not (vl-catch-all-error-p (setq ret (vl-catch-all-apply expr varLst))))
    ret
  )
)
(defun KGA_Sys_ApplyAlt (expr varLst)
  (not (vl-catch-all-error-p (vl-catch-all-apply expr varLst)))
)
; 20190626: Revised.
; 20190625
(defun SvUpdate_CallBackModified (obj rea lst / dat)
  (if
    (and
      (vlax-read-enabled-p obj)
      (setq dat
        (list
          (vlax-get obj 'insertionpoint)
          (vlax-get obj 'rotation)
        )
      )
      (not (equal dat (vlr-data rea) 1e-8)) ; Perhaps higher fuzz?
    )
    (progn
      ; (print "SvUpdate_CallBackModified")
      (vlr-data-set rea dat)
      (SvUpdate_ChangeView (car dat) (cadr dat))
    )
  )
)
; 20190626: Revised.
; 20190626: Renamed.
; 20190625
; https://www.google.com/maps/@?api=1&map_action=pano&viewpoint=48.857832,2.295226&heading=-45
(defun SvUpdate_ChangeView (pt ang)
  (setq pt (utmgeo pt 6378160.0  298.25 18 "N"))
  (setq ang (KGA_Math_Rad_To_Dgr (KGA_Math_LimitAngleRange (- (* 0.5 pi) ang))))
  (princ "\nPlease wait... ")
  (SvUpdate_Navigate
    (strcat
      "https://www.google.com/maps/@?api=1"
      "&map_action=" "pano"
      "&viewpoint="  (rtos (cadr pt) 2 8) "," (rtos (car pt) 2 8)
      "&heading="    (rtos ang 2 0)
    )
  )
)
; 20190626: Removed some prompts.
; 20190626: Renamed.
; 20190625
; (SvUpdate_Navigate "https://www.cadtutor.net/forum/forum/15-autolisp-visual-lisp-amp-dcl/")
(defun SvUpdate_Navigate (url)
  (if
    (or
      (and
        *SvUpdate_browser*
        (KGA_Sys_ApplyAlt 'vlax-get-property (list *SvUpdate_browser* 'visible)) ; Check if object is still available.
      )
      (and
        (or
          (setq *SvUpdate_browser* (KGA_Sys_Apply 'vlax-get-or-create-object '("internetexplorer.application")))
          (prompt "\nError: Internet Explorer cannot be started ")
        )
        (progn
          (setvar 'cmdecho 0)
          (command "_.delay" 2000)
          (setvar 'cmdecho 1)
        )
      )
    )
    (progn
      (vlax-put-property *SvUpdate_browser* 'visible :vlax-true)
      (vlax-invoke-method *SvUpdate_browser* 'navigate url)
    )
  )
)
; 20190626: Revised.
; 20190625
; The selected (static) block should contain an arrow pointing east.
(defun c:SvUpdate ( / dat enm obj)
  (if
    (and
      (setq enm (car (entsel)))
      (setq obj (vlax-ename->vla-object enm))
      (or
        (= "AcDbBlockReference" (vla-get-objectname obj))
        (prompt "\nError: this is not a block reference ")
      )
    )
    (progn
      (if *SvUpdate_objectReactor*
        (vlr-remove *SvUpdate_objectReactor*)
      )
      (setq *SvUpdate_objectReactor*
        (vlr-object-reactor
          (list obj)
          (setq dat ; Reactor data.
            (list
              (vlax-get obj 'insertionpoint)
              (vlax-get obj 'rotation)
            )
          )
          '(
            (:vlr-modified . SvUpdate_CallBackModified)
          )
        )
      )
      (SvUpdate_ChangeView (car dat) (cadr dat))
    )
  )
  (princ)
)
	 
 
	Sample_new.dwg