Host is down once data uploaded

Hello Everyone, I have hosted my shiny app in shinyapps.io under paid subscription. One of my client started to use app from today morning and he got error (Disconnected from Server). I have checked log file and found,

2025-04-08T08:32:25.836731+00:00 shinyapps[13811677]: System has not been booted with systemd as init system (PID 1). Can't operate.
2025-04-08T08:32:25.841014+00:00 shinyapps[13811677]: Failed to connect to bus: Host is down
2025-04-08T08:32:25.845198+00:00 shinyapps[13811677]: Warning in system("timedatectl", intern = TRUE) :
2025-04-08T08:32:25.849337+00:00 shinyapps[13811677]: running command 'timedatectl' had status 1

As, I don't have client data with me, I didn't understand from log file what is the reason behind this error. Photos are attached in below. Can anyone help me to dig into. Thanks in advance.

Kind regards
Shafiul

Are you aware that with a paid subscription you should have access to the Premium email support?

I'm not sure, but I suspect the error messages you see in the logs are not actually the problem (as you can see that package loading continues after the error message). My guess is that the client data is causing the app to run out of memory, which leads to "(Disconnected from Server)".