Growth Chart Not Displaying

I moved the site from a VPS from one provider, to another VPS from a different provider.  After the move, I noticed that the growth chart no longer displays any graphs no matter which source is selected in the drop-down.  After the move I ran the check on directory permissions and only found that ffmpeg was not executable and the write permissions of the other folders were correct.  Any ideas why the growth chart stopped displaying charts?  The little spinning thingy spins for a second and disappears but no chart.

I am having a problem too, but only with the members. I am just looking into it now, but i think it has something to do with my servers date and time. I am stationed in Asia and my server is in cali and in my php.ini file I stated LA time as well. When I look at the date in the member grow chart, it is a day behind and when I change the date todays date in asia it shows up. I will dig into this a little more and let you know.  

It started working again.  And then just as mysterious, it stopped again.  So any light you can shine on this would be appreciated.

I was not working and then around midnight, Pacific time, USA it started working and has been working now for more then 36 hours. I then cleared the cache to see if that affected it and it did not. I am not sure what is happening here, but it is odd. I am just going to say it is a goest and left at that unless it happens again     

Yes, I noticed mine started working again as well.  I have yet to upgrade the site files to match Beta 2

a few of mine stopped working today now...

if I change the "to" date to tomorrow... it works fine...

anyone hav any thoughts as to why this would happen?

mine hasn't returned. It only works if I change the period to include tomorrow.

I wish I could help.  My problem went away and it has been working since.  I have not knowledge of the files that drives this.

Not only did mine stop working when I performed the 7.1.1 upgrade, but the date format used is Australian, while it had been using the US format I have my site set to.

mine magically started working again yesterday...