@igor-vitor21
Obviously the POST-OPENER did not use any dataset, what is very cleary in his shown code.
So i would sugest to continue to work without any DATASETS in this case.
Do not start to mix the both ways, or you will get a lot of problems later.
So, in this case → take INSERT() or SAVE()…
insert - Velo API Reference - Wix.com
save - Velo API Reference - Wix.com