Make sure you can access the shared folder on the server or workstation acting as a server from each workstation that is running TATEMS without needing a password.
Also make your you can create a text file in that folder that is housing the database from each user and workstation running TATEMS to ensure you have full read write access to the folder.
If you need a password to access it then you should change the settings on the shared folder so that you don't need a password, otherwise you will have to connect the use a password to open the folder before you even try to start TATEMS
If the TATEMS shared database file is on another workstation computer and not on a server then...
Type "advanced sharing settings" into the Windows search and click on Manage Advanced Sharing Settings and then look at each of the expandable sections and make sure Require Password and/or password protect is turned off.
And on an other note.
If you are using Windows 10 it is now recommended that you do not use a drive letter to connect to the shared database.
Instead you should use this format (UNC format)
This is because of an update to Windows 10 called AutoDisconnect that will automatically and randomly disconnect mapped drive letters during your work day.
When the drive letter disconnects it can cause corruption to the backend database file.
Also check your power settings make sure that none of your workstations or laptops go into sleep or hibernate mode while TATEMS is running.