Imported list template error message: This item might not exist or is no longer available

Hello Vikram_Samal ,

Thank you for your reply. The "Team Collaboration Lists" Feature is enabled and has been enabled all this time. I failed to mention that I have indeed exported other simple lists as templates and they have been successfully imported to the new site collection without any issues at all.

The problem seems to be this particular list, where the difference between this list and the others is what I mentioned before that, there are numerous calculated columns and SharePoint Designer workflows that are responsible for updating data in particular columns.

Would you be able to confirm if these aspects affect list imports in SharePoint Online? Because I have worked tirelessly in the creation of lists such as these, to just now realize that SharePoint Online doesn't support moving lists such as these from site to site...

Thank you very much!