I upgraded, it stalled in template rebuilding. Next, I went to admin.php, I clicked to run deferred options as advised. The admin.php stalled again and is now blank so I cannot administer site. Site works OK. Any ideas?
Source of admin.php
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<META content="text/html; charset=utf-8" http-equiv=Content-Type></HEAD>
Go back to the installer and rebuild the master data. If it's stalling when doing rebuilds, that's going to potentially be a problem. You may need to try this multiple times if it continues as it may be indicative of a server issue.