Could not initialize class bad.robot.temperature.IpAddress$

[AdnamsDeveloper]

Hello, we have temperature-machine installed on three Raspberry Pi 4 Model B Rev 1.5s, two as clients and one as the server.

I am intermittently getting the following error in the temperature-machine.log file:

2023-07-26 09:02:51:223+0100 [temperature-reading-thread-1] ERROR An error occurred executed a scheduled task (RecordTemperature(bad.robot.temperature.ds18b20.SensorReader@1363df7,HttpUpload(temp-wareh/127.0.0.1,Client(Kleisli(org.http4s.client.blaze.BlazeClient$$$Lambda$732/20340783@e93c),IO$16419391)),bad.robot.temperature:DEBUG in 4c12b6)) Could not initialize class bad.robot.temperature.IpAddress$

The device is reachable over the network, it's connected via wifi and ifconfig shows the following:

wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.7.22 netmask 255.255.255.0 broadcast 192.168.7.255 inet6 fe80::39bc:cfba:a738:420d prefixlen 64 scopeid 0x20<link> ether e4:5f:01:cb:0c:ce txqueuelen 1000 (Ethernet) RX packets 2528350 bytes 658068666 (627.5 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1269346 bytes 205970892 (196.4 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

I understand that this could be related to the content of the hosts file, so here is the contents of that:

pi@temp-wareh:~ $ more /etc/hosts 127.0.0.1 temp-wareh

The symptoms seem to vary, but right now when I browse to the server it shows the temperatures from the two clients, but not from itself. The hardware is fine as I can read the DS18B20 directly:

pi@temp-wareh:~ $ cat /sys/bus/w1/devices/28-062130a4e2a6/w1_slave e5 00 4b 46 7f ff 0c 10 ed : crc=ed YES e5 00 4b 46 7f ff 0c 10 ed t=14312

How can I troubleshoot this error, please? Thank you