Crystal Reports Logon Failed

I am designing a Crystal Report in VB.NET VS-2017 Community edition. Operating system is Win-7/32 bits. CR version is 13_0_24

While using the Database Expert,I try to link my .accdb file with the report(Via the Set Datasource Location wizard) but get an error; Database Logon Failed. Error code is 0x80004005 Unspecified Error. The MS Access database does not have a password set.

The strange thing is that this is a sporadic error.At times,it works perfectly while at times it will not proceed any further.

What could be the issue.

Thank You Khalid.