"Cannot connect to the Internet to retrieve extension list"

[behinger]

I got this bug on a headless matlab installation on my server (which definitely has internet ;)).

Installing ICLabel                                                                  
Error using plugin_getweb (line 18)                                     
Cannot connect to the Internet to retrieve extension list    
                                                                                             
Error in plugin_askinstall (line 36)                                                
    plugins = plugin_getweb('import', []);                                     
                                                                                              
Error in Project/preprocessAll (line 456)                                
                    evalc('plugin_askinstall(''ICLabel'',[],true)');       
 preprocess_p3.m~
                                                                                              
Error in main_automagic (line 50)                                         
project.preprocessAll(); 

I havent got time to look into it, I manually copied the to-be-downloaded files from another instance of automagick.