@storeapps
thanks for your reply.
i can only see two warnings but no error using chrome’s console.
also, i made it works by displaying the name field. if i hide the name field, the “there was a problem with the request” error is back.
this is just in the case of subscribing using [enter] on keyboard instead the subscribe button.
i wonder if this error is on me or is plugin’s bug?
sorry for my bad english