I'm not really seeing any error messages in there (or I could be missing something).
If you want to get better output of possible errors, on the job step doing the reindex, edit that step, go to Advanced and in the middle of the screen there is a section for Output File.
Add a filename in a directory that the Agent has permissions for (the built in Jobs directory should work). You can then review the file and get better details of any errors.
Sue