Greetings.
According to the logs, can't open the downloaded zip file, but checking at the $PENTAHO_HOME/pentaho-solutions/system/plugin-cache/downloads directory, those files are html like this:
<html>
<head><title>301 Moved Permanently</title></head>
<body bgcolor="white">
<center><h1>301 Moved Permanently</h1></center>
<hr><center>CloudFront</center>
</body>
</html>
I modified the marketplace.xml and hosted in a private apache server by just changing http to https at the package url's from those projects and installs perfectly. Plus, only affects Pentaho Server, PDI it's not affected with this issue.