2
The only error here you need to worry about is number 2. The blank page and fatal error.
Anytime you see 'warning' or 'notice' errors, this just verbos reporting from php, these are not code failures but notices letting the developers know where elements in their code could be cleaned up a bit.
You'll find most modules have some notices or warnings.
For the fatal error, I don't use this module so I can only suggest that you try reuploading that module, then either reinstall or update. Could be that a file failed to upload properly.
HTH