Package install fails, causes 500 server error. Umbraco ver 7.5.4

[Aeptitude]

This occurs when doing a web install or a manual install.

angular.min.js?cdv=585306074:106 POST http://localhost:7615/umbraco/backoffice/UmbracoApi/PackageInstall/InstallFiles 500 (Internal Server Error)

In the umbraco interface I get the following error

An error occured

Could not find file 'C:\*\Umbraco\Solution\Umbraco.Web\App_Data\5c8bd840-605c-4ccf-9f9e-016fc67354a8\epiphany.seo.metadata.css.css'.

Umbraco version 7.5.4.

Once this error occurs, umbraco thinks the package is installed, but it does't appear in the property editors.

Apologies if this has already been noticed / is being worked on

Many thanks

[Justawebguy]

I'm having the same issue after having to reload my computer and go to a backup of my project in visual studio. Whenever I try to reinstall this package, I get this error. Mind you I was able to install it before I reloaded my computer. If I find a solution, I will comment back here.