my start page does not appear and I already desintalei and went back to INSTALLING but still nothing
This is the CLOSED bug reporting section and therefore absolutely the wrong place to make such a post.
If you are requesting help, then please make a full and detailed post in the 'How Do I' section.
If you are trying to report an actual bug in the C2 software then make a new post in the 'Bug' section, ensuring you follow ALL of the Bug Reporting Requiremtnts.