2 things might go into your way here:
1) Make sure browser pop-ups are not blocked.
2) Make sure folder permissions and ownerships are allowing installations
Initially browser popups were denied, however I have allowed popups in Firefox from that domain, which allows the new windows (the 404 pages mentioned) to open in a new tab.
As far as permissions, not sure what you mean. After clicking continue, it shows that the installation was successful at the end of the process. It just seems to stall on those 2 items and pop up a 404 page with "component not found".
ok. It says at the end that the process is successful, but does this mean that those 2 items that are looking for a second step are also installed correctly?