This can be a permission issue. In this case, you have to contact your hosting company so that they can modify the file permissions of your server: https://codex.wordpress.org/Changing_File_PermissionsIn the meantime, you can manually update the plugin or ask your hosting company to manually update the plugin, by downloading it via our website and uploading it via FTP ( wp-content』 > 『plugins』). You will have to delete the version of the plugin that you currently use before.
It is also possible that this plugin will solve your issue