The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine.

The "Microsoft.ACE.OLEDB.12.0" provider is a database connection manager that allows access to various databases, including Microsoft SQL Server, Oracle, and IBM DB2. If the provider is not registered on the local machine, it may be due to a missing or corrupted database redistribution package, or a problem with the Windows registry. You can try reinstalling the package or repairing the registry to resolve the issue. 

If you have built your project under x86 platform, then in order to resolve you issue you should install the following packages on your machine:

In order to use the 'Microsoft.ACE.OLEDB.12.0' provider you must install the Microsoft Access Database Engine 2010 Redistributable first, this installation is available at: http://www.microsoft.com/download/en/details.aspx?id=13255 .

After the installation has complete, try running you application

Depending on the app(32/64bit) using the connection you could just install

• Access 2007 engines (only 32bit)
• Access 2010 (32&64bit)
• Access 2013 full runtime (32&64bit)
• Access 2016 runtime
• Access 2019 runtime

Hope this helps!

OLE DB provider "Microsoft.ACE.OLEDB.12.0" for linked server "(null)" returned message "Unspecified error"

OLE DB provider "Microsoft.ACE.OLEDB.12.0" for linked server "(null)" returned message "Unspecified error

or

ole db provider "microsoft.ace.oledb.12.0" for linked server "(null)" returned message "the select statement includes a reserved word or an argument name that is misspelled or missing, or the punctuation is incorrect.".

Here is the quick resolution for this fix, try run below commands in SQL Server

USE [master] 
GO

EXEC sp_configure 'show advanced options', 1
RECONFIGURE
GO
EXEC sp_configure 'ad hoc distributed queries', 1
RECONFIGURE
GO

This resolved my problem!