500 internal server error

[toujour]

Hi,

I'm using a HW3.1 HL and I have this problem with new FW2.8 (device is new, out of the box).

I can't enter in flashsys (check the attachment)
Factory reset and change SD doesn't work.

I have a solution from an image of an other working project (backup and then restore on new SD).....but after some days I receive the same ERROR.

Do you have a definitive solution for me ?

BR,
Alberto

I directly changed the browser ( from firefox to chrome and edge ) but I see the same message