SharePoint Import from CSV file is not loading

Hello! Wonder if anyone can help troubleshoot a loading error (not loading at all) in the data I imported from CSV file. I am using the "Import from CSV app" to load bulk data to my SharePoint list. Everything is working from uploading to submission, however it stops loading at the end.

the "Creating items... Please do not close the browser. Estimated time needed is 1 minute" dialog box simply freezes even after several minutes and hours of waiting, and when you check the sharepoint list nothing has been loaded.