When you are installing all plugin at one time together, and get this message:
“Fatal Error: Class 'TGM_Bulk_Installer' not found in /home/phoo/public_html/calibra/wp-content/themes/batakoo/class-tgm-plugin-activation.php on line 1579".
"Download failed. A valid URL was not provided"
It means that you cannot install it all together at one time.
You have to install each plugin one by one