Is there a specific reason, that the image is called -rc2?
docker load --input=check-mk-enterprise-docker-2.1.0p11.tar.gz
8b45c44b15e0: Loading layer [==================================================>] 2.048kB/2.048kB
bc590ea01db6: Loading layer [==================================================>] 329.2MB/329.2MB
7832e3c2cdb4: Loading layer [==================================================>] 216.9MB/216.9MB
4244d4f08dca: Loading layer [==================================================>] 881.4MB/881.4MB
539fab142321: Loading layer [==================================================>] 6.656kB/6.656kB
Loaded image: checkmk/check-mk-enterprise:2.1.0p11-rc2