You can try to install and activate this extra plugin before importing Covid-19 site package:
The "stuck at 100" during importing is a common problem with many migration plugin, usually due to low PHP limit, or the add one above wasn't installed..
If the addon has been installed then the only thing which cause the upload still stuck, is the hosting PHP limit low preferences.
If you can increase the limit of these 4 PHP settings:
To increase the limit:
- Login to cPanel
- Find the "Select PHP Version" menu: https://prnt.sc/r5q9a8
- Click the Swith to PHP Options button: https://prnt.sc/r63kqo
- Then there will be an options to adjust/increase those 3 settings above
PS. If you have the Cloud4WP hosting on us recently, you don't need to do anything. Those higher PHP value is already set by default.