MagFit fails to load log (Ctrl+F5, Ctrl+R do not help)

[flyasky]

I'm trying to load log with MagFit and it says:

Sorry, something went wrong.

Please try a hard reload of this page to clear its cache.

If the error persists open an issue on the GitHub repo.
Include a copy of the log and the following error message:

Error: solve@https://firmware.ardupilot.org/Tools/WebTools/modules/build/matrix/matrix.umd.js:1:46674
q@https://firmware.ardupilot.org/Tools/WebTools/modules/build/matrix/matrix.umd.js:1:53373
fit@https://firmware.ardupilot.org/Tools/WebTools/MAGFit/magfit.js:1568:31
calculate@https://firmware.ardupilot.org/Tools/WebTools/MAGFit/magfit.js:795:5
load@https://firmware.ardupilot.org/Tools/WebTools/MAGFit/magfit.js:2196:5

URL: https://firmware.ardupilot.org/Tools/WebTools/MAGFit/
Line Number: 359

The log is quite sensitive, so I'll send it in PM to the assigned person.

[flyasky]

In Chrome, I have a more detailed error:

[IamPete1]

This is usually missing or constant values of the MAG message in the log.