Installs plugin fine but then doesn't load

I’ve install and tried some plugins without any problems Fortin Suite, Soldano and Gojira) but, for some reason, the Petrucci and the new Mesa Mark IIC+ won’t open.
Installation normal, ilok activation no problem bur when I click to open the plugin, the mouse arrow loads for two, three seconds and nothing happens.
In the daw, on the Neural plugin folder there’s nothing there also.