VAT Calculation Worksheet Problem

I am using Manager version 21.4.5 on Kubuntu 18.04, and am based in the UK.

I will shortly need to run my VAT Calculation Worksheet report and when trying to setup a new report for the VAT quarter or trying to edit an existing one I just get a grey page with no opportunity to set up or edit a report.
I have tried importing the localizations and report transformations again, but that has not had any effect.

Any advice or pointers would be most gratefully received.

I can confirm this on my test version. I believe the problem is with the report transformation, not the VAT calculation worksheet itself.

Should be fixed in the latest version (21.4.37)

It is fixed. The problem was something to do with the report transformation which you fixed.