can you give me the version of your PMM Server and PMM Client?
Do you have enough free space inside PMM Server container?
Is pmm-admin tool has been run from root rights?
according to logs your application failed during run
see https://github.com/percona/pmm-client/blob/master/pmm/queries.go#L149-L164 for details
tool has debug flag.
can you run in debug mode and share output?
theoretically, needed command can look like this:
/usr/local/percona/qan-agent/bin/percona-qan-agent-installer -debug -mysql=false -server-user=USER -server-pass=PASSWORD PMM-IP
please use the following command if you are working via SSL
/usr/local/percona/ qan -agent/bin/percona- qan -agent-installer -debug -mysql=false -server-user=USER -server-pass=PASSWORD -use-insecure-ssl PMM-IP:443