Support with 456ecology template - plug in problems

Hello!

I have a problem with a LayerSlider plug in. When I try to install this plug in, the system have this message: Destination folder already exists. /home/content/58/9070458/html/ecoenergy/wp-content/plugins/LayerSlider/

Plugin install failed.

When I go to the documentation area and search the instructions for this plug in says locate the file layerslider-import-data and import it but I don’t have this file in my template.

With the plug in contact form 7, I have the same problem; the folder already exists.

I need help with this two issues as soon as possible. Thanks!!