If this is happening to you, chances are PrettyLinks did not setup properly in your database. Please try the following to correct the issue before opening a support request.
- De-activate, and delete the plugin. Then re-install a fresh copy and Activate.
- Try trimming old Hits – PrettyLinks -> Tools -> Trim Clicks tab.
Note: If your hits database grows too large it can cause strange things like this to happen.
- De-activate PrettyLinks, then using a Tool like PhpMyAdmin, browse to your WordPress database and run the following query. When the query is executed find and delete these two rows “prli_db_version” and “prlipro_db_version”. Then re-activate the plugin, and try creating a new link. This will force PrettyLinks to re-attempt initializing the database.
SELECT * FROM wp_options WHERE option_name LIKE '%pr%';
If none of the above work, please open a support request.