I want to add the app Splunk Dashboard examples to my 7.01 environment. As soon as I select find new apps I get the error message error connection reset by peer
Follow this process (https://docs.splunk.com/Documentation/AddOns/released/Overview/Singleserverinstall ) to manually download and install app on standalone splunk instance.
Additionally Splunk 7.0 is EOS (End of support) now so I'll suggest you to upgrade it to supported version (Ref. https://www.splunk.com/en_us/legal/splunk-software-support-policy.html )