Ticket #37943: 37943.patch

src/wp-admin/js/updates.js

@@ -641 +641 @@
          * @param {string} response.activateUrl URL to activate the just installed plugin.
          */
         wp.updates.installImporterSuccess = function( response ) {
+                var activateUrl = response.activateUrl.replace( '/network', '' );
+
                 wp.updates.addAdminNotice( {
                         id:        'install-success',
                         className: 'notice-success is-dismissible',
-                        message:   wp.updates.l10n.importerInstalledMsg.replace( '%s', response.activateUrl + '&from=import' )
+                        message:   wp.updates.l10n.importerInstalledMsg.replace( '%s', activateUrl + '&from=import' )
                 } );
 
                 $( '[data-slug="' + response.slug + '"]' )
@@ -651 +653 @@
                         .removeClass( 'install-now updating-message' )
                         .addClass( 'activate-now' )
                         .attr({
-                                'href': response.activateUrl + '&from=import',
+                                'href': activateUrl + '&from=import',
                                 'aria-label': wp.updates.l10n.activateImporterLabel.replace( '%s', response.pluginName )
                         })
                         .text( wp.updates.l10n.activateImporter );