Hi!

I finished working on an Umbraco site a month ago, and had to open up the project again today. However, for some reason it now won't build, giving me the following error as seen in the picture below.

I've tried checking online for a possible solution, but I have been unable to find any.

This is my processing.config:

<?xml version="1.0" encoding="utf-8"?>
<processing preserveExifMetaData="true" fixGamma="false" interceptAllRequests="false" allowCacheBuster="true">
  <presets>
  </presets>
  <plugins>
    <plugin name="Alpha" type="ImageProcessor.Web.Processors.Alpha, ImageProcessor.Web"/>
    <plugin name="AutoRotate" type="ImageProcessor.Web.Processors.AutoRotate, ImageProcessor.Web" enabled="true"/>
    <plugin name="BackgroundColor" type="ImageProcessor.Web.Processors.BackgroundColor, ImageProcessor.Web" enabled="true"/>
    <plugin name="Brightness" type="ImageProcessor.Web.Processors.Brightness, ImageProcessor.Web"/>
    <plugin name="Contrast" type="ImageProcessor.Web.Processors.Contrast, ImageProcessor.Web"/>
    <plugin name="Crop" type="ImageProcessor.Web.Processors.Crop, ImageProcessor.Web" enabled="true"/>
    <plugin name="DetectEdges" type="ImageProcessor.Web.Processors.DetectEdges, ImageProcessor.Web"/>
    <plugin name="EntropyCrop" type="ImageProcessor.Web.Processors.EntropyCrop, ImageProcessor.Web"/>
    <plugin name="Filter" type="ImageProcessor.Web.Processors.Filter, ImageProcessor.Web"/>
    <plugin name="Flip" type="ImageProcessor.Web.Processors.Flip, ImageProcessor.Web"/>
    <plugin name="Format" type="ImageProcessor.Web.Processors.Format, ImageProcessor.Web" enabled="true"/>
    <plugin name="GaussianBlur" type="ImageProcessor.Web.Processors.GaussianBlur, ImageProcessor.Web">
      <settings>
        <setting key="MaxSize" value="22"/>
        <setting key="MaxSigma" value="5.1"/>
        <setting key="MaxThreshold" value="100"/>
      </settings>
    </plugin>
    <plugin name="GaussianSharpen" type="ImageProcessor.Web.Processors.GaussianSharpen, ImageProcessor.Web">
      <settings>
        <setting key="MaxSize" value="22"/>
        <setting key="MaxSigma" value="5.1"/>
        <setting key="MaxThreshold" value="100"/>
      </settings>
    </plugin>
    <plugin name="Halftone" type="ImageProcessor.Web.Processors.Halftone, ImageProcessor.Web"/>
    <plugin name="Hue" type="ImageProcessor.Web.Processors.Hue, ImageProcessor.Web"/>
    <plugin name="Mask" type="ImageProcessor.Web.Processors.Mask, ImageProcessor.Web">
      <settings>
        <setting key="VirtualPath" value="~/images/imageprocessor/mask/"/>
      </settings>
    </plugin>
    <plugin name="Meta" type="ImageProcessor.Web.Processors.Meta, ImageProcessor.Web"/>
    <plugin name="Overlay" type="ImageProcessor.Web.Processors.Overlay, ImageProcessor.Web">
      <settings>
        <setting key="VirtualPath" value="~/images/imageprocessor/overlay/"/>
      </settings>
    </plugin>
    <plugin name="Pixelate" type="ImageProcessor.Web.Processors.Pixelate, ImageProcessor.Web"/>
    <plugin name="Quality" type="ImageProcessor.Web.Processors.Quality, ImageProcessor.Web" enabled="true"/>
    <plugin name="ReplaceColor" type="ImageProcessor.Web.Processors.ReplaceColor, ImageProcessor.Web"/>
    <plugin name="Resize" type="ImageProcessor.Web.Processors.Resize, ImageProcessor.Web" enabled="true">
      <settings>
        <setting key="MaxWidth" value="5000"/>
        <setting key="MaxHeight" value="5000"/>
      </settings>
    </plugin>
    <plugin name="Rotate" type="ImageProcessor.Web.Processors.Rotate, ImageProcessor.Web"/>
    <plugin name="RotateBounded" type="ImageProcessor.Web.Processors.RotateBounded, ImageProcessor.Web"/>
    <plugin name="RoundedCorners" type="ImageProcessor.Web.Processors.RoundedCorners, ImageProcessor.Web"/>
    <plugin name="Saturation" type="ImageProcessor.Web.Processors.Saturation, ImageProcessor.Web"/>
    <plugin name="Tint" type="ImageProcessor.Web.Processors.Tint, ImageProcessor.Web"/>
    <plugin name="Vignette" type="ImageProcessor.Web.Processors.Vignette, ImageProcessor.Web"/>
    <plugin name="Watermark" type="ImageProcessor.Web.Processors.Watermark, ImageProcessor.Web"/>
  </plugins>
</processing>

Has anyone come upon the same problem before? I really have no idea how this happened, since no one has touched the solution since it was finished a month ago.