Core: SPC: -History graph do not work

[markuska00]

Home Assistant release with the issue:
0.79.0

Operating environment (Hass.io/Docker/Windows/etc.):
Hassbian

Component/platform:
https://www.home-assistant.io/components/spc

Description of problem:
I have a problem.
When I run the SPC component the History graph from sensors and switches do not work.
The history graph becomes emty with no updates.
All my sensors get the same fault not only sensors from SPC.

If I remove SPC from the components the History graph works again.

[cgarwood]

Are there any errors in your Home Assistant log, or any errors in your browser's Javascript console?

[markuska00]

Maybe this line have something to do with the error.

2018-10-01 08:26:33 WARNING (Recorder) [homeassistant.components.recorder] Ended unfinished session (id=32 from 2018-09-29 08:58:16.394210)

[markuska00]

Or this line

2018-10-01 08:26:50 ERROR (Recorder) [homeassistant.components.recorder.util] Error executing query: dict_values([, , , , , , , , , , , , , ]) is not JSON serializable

[mbrrg]

I have reproduced and found the problem. Will post a fix for this issue tomorrow.