Hello @josenebr
Thank you for trying our plugin.
I am sorry to read about your issue. It seems like you have a database privileges issue. The plugin keeps the activity log in two own tables in the database, that are created during activation.
If you have installed the plugin and cannot see the tables, then the plugin failed to create them. Can you please:
1) Deactivate the plugin
2) Make sure the WordPress database user has the correct privileges to create tables etc
3) Activate the plugin
This should do the trick and once the tables are created, you should be able to restore the database user privileges.
Can you please try the above and keep us posted about this issue?
Looking forward to hearing from you.