I started getting the "Expected number, "MNaN,NaNLNaN,NaNA…" error randomly a couple of weeks ago. I haven't been able to find the root cause. The data looks fine. Screenshot 2 below is from a Chromebook when it working. When I get the error my charts are gone but the labels still show (see screenshot 1 on Ubuntu). I assumed it was a Google Visualization bug and would be fixed by now. Bad assumption. I am going to run this on a Chromebook for an extended period of time to see if the error occurs there. My desk machine is Ubuntu 16.04 with Chrome Version 59.0.3071.86.
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