If you are trying to set up an ADLS connection in Qlik Replicate then the below error message is very common to see. This issue is specific to an environment like wrong DNS entries, azure private network endpoint, Firewall block, Etc., It is hard to pinpoint the exact issue without analyzing the environment, but I am proposing simple steps that you can try from replicate machine.
Run openssl, telnet and tracert commands as below from replicate server. All 3 commands should be able to communicate with your storage account with no issue. If there are any issues reported as shown below, please contact your network and system admin team to resolve the issues.
Once the issue is resolved we should see below result for openssl.
Now we can go back to replicate UI and do the test connection again to see the succeeded message.