Missing Component Module Error

If you attempt to assign an item to a page template and get an error similar to:
Error Code: MER-TUI-MGR-00008
Description: Component module '110' not found
check to see that the item is fully installed. Go to admin > store > pages and click the Items link on the right side. You will see a screen like:

If the module name is blank, click the button that says "Edit Here". That will bring up a drop down list of module names. Locate the module name that should be in the blank space and select it. Click the Update button at the bottom of the page.

Missing Database Error

If you get a database not found error similar to:
Runtime error in /mm5/5.00/modules/shipping/sortship.mvc @ [0000001c:0000010c]: sortship.mv: Line 613: MvOPEN: Error opening 'Merchant5/s01/sortship/sortship.dbf': No such file or directory Runtime error in /mm5/5.00/modules/shipping/sortship.mvc @ [0000001c:000009c8]: sortship.mv: Line 674: MvCLOSE: Database 'SortShip' is not open
you probably tried to unassign a module and then re-assign it back. Unassigning a Merchant 5.x module needs to be done in reverse order. Hence, if you inserted tokens in page templates, those tokens need to be removed. The item also needs to be removed from the items list of each page it was assigned to. Then it needs to be removed from the master items list. If you get a message that it is still assigned to a page, click the Edit button to the right and then the Pages link at the top. That will list each of the pages the item is on. Remove the item from the template code and then remove it from the items list of that page. Repeat this process until the item is removed from all pages. After all of that has been done, you can unassign a module from the menu that it is on. To correct the above error you will also have to completely remove it from the admin > modules list of modules. Once that is done, you can re-install the module.