Dear team,I tried to upload a .csv file but it failed. At step "Select Sheet", the context of CSV file was not displayed in Configure. Therefore, could you please support me to fix the issue?

Try uploading the file with only a single sheet also its not very clear from the picture what the issue is....

May be related, organizations do now implement sensitivity labels. If your organization uses them ensure document tagged to lowest level.

https://learn.microsoft.com/en-us/microsoft-365/compliance/sensitivity-labels?view=o365-worldwide