Module is shown as installed but I can't access its settings I have Drupal 7 installed and I am trying to install Webform module. Firstly the page shows " The website has faced some unexpected error" and then after re-accessing the Modules page, it shows the Module to be enabled and links to it's settings as well.

But when I go to Create Content, I don't see any Webform option.

This is the error generated in the Reports / Log.   


  DatabaseSchemaObjectExistsException: Table webform already exists. in DatabaseSchema->createTable() (line 657 of /home/evosysgr/public_html/includes/database/schema.inc).


Kindly suggest what is to be done.
Generic way when you face 


  The website has faced some unexpected error


when enabling module is:


Find in logs what error was it
Fix it's cause
Disable and uninstall module you was enabling
Enable it again


Alternatively, if you have backups, better way would be:


Find in logs what error was it
Fix it's cause
Restore site from backup to it's state from just before error
Try again


If you have specific problem with this way, ask new question, explaining exactly what you need to know, what you did, what was in logs and so on.