DataGridViewComboboxcell value is not valid

You encountered this error when you're about to post a payment transaction.Notice that the deposit Account column at the left side are blank. To resolved this:

1. Go to Loan Account: Adjustment Module
2. Filter the center
3. Open the Loan Detail of Each Client
4. In the Link To Deposit Box, set the default deposit link.

Reportserver cannot decrypt error

Solution:

1.       Go to Reporting Services Configuration Manager then select Encryption Keys and click delete.

2.       Apply default settings both in Report Server Virtual Directory and Report Manager Virtual Directory.