Sometimes that warning is a false positive based on how different hosting environments are configured. Have you tried cloning? Everything should work fine unless the cloning is actually taking longer than 180 seconds or hitting a memory error.
The warning doesn’t mean the plugin won’t work. Give it a shot and see what results you get!
Thanks for the prompt reply. When I try to clone the main blog I get the “HTTP ERROR 500 currently unable to handle this request” almost immediately. The memory limit was set to 2024M. However, I am able to clone other blogs of the same multisite installation. I suppose I have to dig more into that issue, any hint is more than welcome.
Regards,
Pavlos