plugin

i had installed the wordpress on ys.yangonsolutions.com

all things were ok but after all the installation of theme

i start getting message word “word press the site is experiencing technical difficulties”

due to this i again reinstall word press

now all things are ok but i am getting message
This theme requires the following plugins: Physcode – Visual Composer Addon, Travel booking, Visual Composer and WooCommerce. This theme recommends the following plugin: Revolution Slider.
from where to get the plugin as no such plugin are avilable in the dowload . all this activity is done with in one hour of theme purchased

pl guide me
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