formcast-visual-designer.btm fails to load toolbox template.

[joec4281]

:: Toolbox loaded from template
ver
echo _batchname: echo %_batchname
if exist %_batchpath\templates\toolbox.jsonc echo %_batchpath\templates\toolbox.jsonc exists
set hTool=%@formload[%_batchpath\templates\toolbox.jsonc]
echo hTool: %hTool
echo FORMCAST_DLL %FORMCAST_DLL
if exist %FORMCAST_DLL echo FORMCAST_DLL exists in %FORMCAST_DLL
iff "%hTool" == "" then
  echo ERROR: Failed to load toolbox template.
  call "%_batchpath\..\formcast-check.btm" unload
  endlocal & quit 1
endiff

TCC  36.00.34 x64   Windows 10 [Version 10.0.19045.7184]
_batchname: echo E:\Documents\tcc_plugin\FormCast\examples\designer\formcast-visual-designer.btm
E:\Documents\tcc_plugin\FormCast\examples\designer\\templates\toolbox.jsonc exists
hTool:
FORMCAST_DLL e:\utils\formcast.dll
FORMCAST_DLL exists in e:\utils\formcast.dll
ERROR: Failed to load toolbox template.

Ref: https://jpsoft.com/forums/threads/formcast-v1-0-gui-framework-for-tcc-v36-net-plugins.13052/post-75389