TDS Return - NSDL RPU 4.3 Error Message

While trying to prepare a TDS return for 26Q, Q1, FY2022-23 through NDSL RPU 4.3 version, we are getting the following error:

"T-FV-3175 Either you are using old FVU version or old challan file (i.e. .csi file), please use the latest FVU version and challan file available at www.tin-nsdl.com and validate the file."

We are using the latest RPU 4.3, FVU Version 7.8 and challan downloaded today 22/08/2022.

Kindly inform if anyone facing a similar problem and what may be the possible solution.