Hi @vetal81 ,
Can you please try to fix this issue by manually installing Duplicator as explained in the following steps:?
1) Download the plugin from https://www.ads-software.com/plugins/duplicator/
2) Upload the “duplicator-pro” subdirectory to the “wp-content\plugins” directory on your website.
3) Extract the plugin files.
4) Go to your WordPress Admin > Plugins page. You should see Duplicator in the list of plugins if it was uploaded properly.
5) Activate Duplicator.
Please make sure that the wp-content directory has the 755 permission set recursively for the directories before proceeding with the above steps.
I hope this helps. If you have any other questions, feel free to ask, and I’ll be happy to assist you.
Thanks!
Manually Install a WordPress Plugin using FTP