Can’t install Netdata on ubuntu 20.04

— Using /tmp/netdata-kickstart-p4YGiCD6BB as a temporary directory. —
WARNING Found an existing netdata install at /, but could not determine the install type.

WARNING Unable to find usable updater script, not updating existing install at /.

— Attempting to claim existing install at /. —
— Attempting to claim agent to https://app.netdata.cloud
560
/tmp/netdata-kickstart.sh: 765: /usr/sbin/netdata-claim.sh: not found
WARNING Unable to claim node, you must do so manually.