Mac App Store Apps Not Downloading

I launch the Mac App Store on my 2011 iMac. Find an App that I want and Click Buy. Sign in to my Account and Buy it.

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Nothing happens. It doesn't download and in the left corner there is just a spinning pin wheel.

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Go to purchases section and sure enough the transaction went through.

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Click Install from the Purchases Section and again it won't download. Just that spinning wheel on the left side of the store appears.

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This is also a problem with updating apps.

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The issue has been hit or miss for the last month. Some weeks it works and some weeks it doesn't but I have never ever had the issue on my 2011 MacBook Air.

MBA Screenshots:

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Has anyone else experience this issue? No error code, it just don't download.

Any ideas on troubleshooting it?