I have very unstable internet and mostly no connection today, tried to power cycle both modem and ONT box but didnt help. I have red ALARM led on for the ONT box which is nokia XS-010X-Q as can be seen in the picture. How can this be solved?

I have very unstable internet and mostly no connection today, tried to power cycle both modem and ONT box but didnt help. I have red ALARM led on for the ONT box which is nokia XS-010X-Q as can be seen in the picture. How can this be solved?
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