Hello Mac P,
This issue was discussed also here
. The problem is in the Visual Studio, because it caches the assemblies and after minifying - they still have the same version, token and the VS doesn't recognize that this assemblies are new.
You may check if the path to the referenced assembly is the same as the path to the minifed assemblies. If it is ok you can clean up a couple of times and at the end you may delete the bin folders and ClientBin manually and then rebuild.
When you start new project and reference the minified assemblies this shouldn't happen.
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