/ is full within the UVB appliance causing Apache to throw errors. This may be due to the workerd process creating logs which fill up the / partition.
You can safely delete the workerd dump files.
Postgres log files and Apache log files all those can be deleted
/var/log/apache2/ delete all contents
/var/log/psql/ delete all contents
/var/spool/phdvb/core/..workerd file delete the workerd logs only