Well, now I get a
```
UDP RTT test: Using irtt
which: /usr/local/sbin/fping6 is not an executable file
which: /usr/local/bin/fping6 is not an executable file
which: /usr/sbin/fping6 is not an executable file
which: Found fping6 executable at /usr/bin/fping6
which: /usr/local/sbin/ping6 is not an executable file
which: /usr/local/bin/ping6 is not an executable file
which: /usr/sbin/ping6 is not an executable file
which: Found ping6 executable at /usr/bin/ping6
WARNING: Found fping, but couldn't parse its output. Not using.
Looking up hostname 'mn.h1'.
ERROR: Runner Ping (ms) ICMP failed check: Cannot parse output of the system ping binary (/usr/bin/ping6). Please install fping v3.5+.
```

`sudo apt install fping` tells me, `fping` is at version 4.2-1

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