In case Firebird displays an error with the Client library is missing or invalid title, proceed with the following steps.
Press the Windows button and search for the term “sysdm.cpl”.
When the “System Properties” window opens, go to the “Advanced” tab and select “Environment Variables…”.
Lastly, press “New…” and set the variable “Path” with the value “C:\Program Files(x86)\Firebird\Firebird_3_0”.