Hi,
Above just fixed as I gave it some time, but I will let this post say in here… might it helps others to find solution for same problem.
This is what I did:
* Upgraded CP PHP version to 7.4
* Next changed the PLUGIN directory name on file manager to Plugins-New. To WP Admin, all plugins on WP admin turned to deactivated.
* Back to CP file manager and turned back the plugins directory to its original name.
* Now checked the required plugins listed on Pinkmart Pro Dashboardm and activated them one at the time.
* Finally to the Import Demo and selected the wanted demo, import worked successfully!
Thanks