OK, I got further into the RPI4 issue.
The steps I took:
Fresh installation of Ubuntu 64bit on RPI4B Install Docker Changed the ClearML yml file to the new Mongo + Elastic versions, to support arm644. ubuntu@clearmlserver:~$ docker container list
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
` 995fc4aa9dcb allegroai/clearml-agent-services:latest ...

SuccessfulKoala55 Thanks for the reply.
I tried that, but it doesn't work.

SuccessfulKoala55 Just the regular "destination invalid" in the browser.
What relevant logs are there for this situation?

GrumpyPenguin23 And it was so easy. I'm thinking of giving up and just use a PC instead of Pi.

SuccessfulKoala55

For all the clearml containers:
{"log":"standard_init_linux.go:219: exec user process caused: exec format error\n","stream":"stderr","time":"2021-01-18T15:02:37.789800817Z"}
{"log":"standard_init_linux.go:219: exec user process caused: exec format error\n","stream":"stderr","time":"2021-01-18T15:02:41.536122964Z"}
{"log":"standard_init_linux.go:219: exec user process caused: exec format error\n","stream":"stderr","time":"2021-01-18T15:02:47.973756035Z"}
{"log":"standard_init_linux.go:219: exe...

SuccessfulKoala55 Excellent. Thanks.

SuccessfulKoala55

SuccessfulKoala55 It seems that the server is constantly restarting.