As the add-in is still under development, this is my first priority to fix it,
or else, I can do nothing next week.
After a keep querying google for solution, the following pages return ... so it is time to leave office and take a rest.
Error
We're sorry...
... but your query looks similar to
automated requests from a computer virus or spyware application. To protect our
users, we can't process your request right now.
We'll restore your access as
quickly as possible, so try again soon. In the meantime, if you suspect that
your computer or network has been infected, you might want to run a virus checker or spyware remover
to make sure that your systems are free of viruses and other spurious software.
We apologize for the inconvenience, and hope we'll see you again on Google.
Finally, I found that the add-in is hard-disabled because of a previous crash.
To solve it : Lauch Excel > Help > About > Disabled List > uncheck your add-in > Done !