The connection to the data source "IT Database 2020 2021" could not be established. What is the solution of this error in libre office base

I am using Libre office base. Following message is displayed when i try to run database.
“The connection to the data source “IT Database 2020 2021” could not be established.”
What is the solution of this error.

Hello,

What were you attempting when you received this error? Creating a Base file? Opening an existing one? What database is this Base file using? What specific LO version are you using? What OS?