I have had this shrub for 10 years, and within two weeks this shrub went from green to brown (dying). I peeled back some of the bark, to see if there was some life. It was very hard to scrape with a dark hard like sap. When I looked down as the base of the shrub the same dark sap is dried up and hardened as well and the branches are are just snapping off . I don’t want the other shrubs to die .