I updated my freenas mini from 12.0-U2.1 to 12.0-U3 today. Now the CPU and Memory widgets on the dashboard just spin and never populate with any info.
I have tried to clear cache on browser, tried Firefox, chrome, and even my phone which has not connected to this server GUI before. It looks to me like it is not a browser issue.
I have attached a Debug and a Screenshot.
Please let me know if you need any additional info or have something you want me to try.