We suspect the plugin failed to create a table, or table was corrupted.
Let’s try this solution with the database by following these steps to resolve the problem:
Deactivate and delete the Print Manager Plugin from WordPress
Access the Database
Drop and delete the entry ‘zprint_tables’ field from the wp_options table
Drop and delete the table zp_locations (If it exist in the database)
After the table ‘zp_locations’ and zprint_tables field are dropped from the database.
Now install and activate Print Manager plugin again from www.remarpro.com
These steps will remove any existing fields from the database blocking the tables from being created. On the next activation the tables should be created as a clean install.