Dear M A4,
Welcome to the forum here.
Based on the error message, it seems that you set the specific column as Required but not patch it in the form. Please check whether you hide the column in the form. You can click on + Add fields to see if you can add it to the form in PowerApps and set false on Required can be done in your environment and then do a test to see the result.
Meanwhile, it may be better to type SubmitForm(SharePointForm1);NewForm(SharePointForm1) on the Submit button.
Thanks for your effort and time!
Sincerely,
Cliff | Microsoft Community Moderator