No access project hub

I have access to all items of the community, except for the project hub.

What should I do to fix this?

Please describe exactly what you mean by "no access".

For future reference, there is a forum section dedicated to the Create Project Hub:
http://forum.arduino.cc/index.php?board=109.0
where people knowledgeable on this topic are more likely to see your post. I have requested this thread be moved there so there is no need to make another post in that section.

Hi. The bug with the Arduino Project Hub should now be fixed.

I'm sorry for any inconvenience this has caused.
Per