Web interface not available

Good afternoon

I am runing Screenly OSE on a Raspberry Pi 4

However it seems that the web i/f is falling over

The Raspberry Pi stays up and ssh access is possible

But the web page is not available

A reboot of the Raspberry Pi solves the problem for a short time (couple of days)

The details of my Raspberry Pi OS are

Static hostname: raspberrypi
Icon name: computer
Machine ID: 4eac09fb944d442c81bae0528516bbb9
Boot ID: a73ff364e1054d18aef2080fbbd528b5
Operating System: Debian GNU/Linux 11 (bullseye)
Kernel: Linux 6.1.21-v8+
Architecture: arm64

I believe that OS is patched up-to-date

Any help advice (what logs/services) to check would be most appreciated

Thanking you

Yours sincerely

Ian Taylor