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Make sure you have checked all the server requirements before the installation https://xstore.helpscoutdocs.com/article/60-xstore-theme-requirements
In case if automatic plugin installation fails, you can install them manually via your Dashboard: Plugins > Add New > Upload Plugin > Browse plugins archives. Or via FTP, by uploading and extracting the plugin zip files into wp-content/plugins folder – https://www.8theme.com/download-plugins/
Then install demo content from XStore > Import Demos. https://xstore.helpscoutdocs.com/article/34-demo-content
Let us know the result.
it`s ok with activation, but there is a problem with demo installing. First was issue with php memory limit, so I increased it in wp_config.php to 256M, but now when I trying to import demo that I want – nothing happens.
I imported demo succesfully after disabling Revolution slider. Then I enabled Revolution slider, but there are notifications ‘Slider with alias engineer not found’ in some places on website and there aren’t any sliders in revolution slider’s gallery.