Can’t generate csv if has nested form

Hello, I am using GravityExport Lite and GP Nested Forms at same time. It did work well, however, when I was trying to exporting csv today, it failed with showing an error on downloading page. which said:

GravityExport Lite: Something is broken
Error message:Uncaught TypeError: Argument 2 passed to GFExcel\Transformer\Combiner::GFExcel\Transformer\{closure}() must be an instance of GFExcel\Values\BaseValue, null given in /*******/public_html/wp-content/plugins/gf-entries-in-excel/build/vendor_prefixed/gravitykit/gravityexport-lite-src/Transformer/Combiner.php:63<br />
Stack trace:<br />
#0 [internal function]: GFExcel\Transformer\Combiner::GFExcel\Transformer\{closure}('', NULL)<br />
#1 *******/public_html/wp-content/plugins/gf-entries-in-excel/build/vendor_prefixed/gravitykit/gravityexport-lite-src/Transformer/Combiner.php(75): array_reduce(Array, Object(Closure), '')<br />
.........
....
Full error statement is in attached link.

I tried different forms and settings, then located that the issue was caused by a conflict with GP Nested Forms. I guess it probably caused by a update of your plugin or GP Nested Forms(because it was working well), by the way, I didn’t change PHP version.

Could you help me to fix the error?

The page I need help with: [log in to see the link]