Thanks for your support, but I was not able to fix xlsx file upload problem.
Here I had to use csv and working. But I need to use Xlxs for currency column.
https://emeds.com.bd/test-fee/
No problem, I can share the file.But that file is not the problem, I have a different wp installation and this excel file works fine there.
Is there any way I can remove all data of this plugin? Because I tried to reinstall the plugin, and shortcodes starts next after previous number not from 1, it starts from 5-6.
If I was able to delete all data there might be a way.