This file is too big. Files must be less than 1500 KB in size.
When installing a theme or plugin for WordPress Multisite you may run into the error “This file is too big. Files must be less than 1500 KB in size.”. By default the maximum upload file limit for WordPress Multisite is set to 1500 KB. To increase this setting navigate to Network Admin -> Settings -> Network Settings and under Uploads Settings, change the “Max upload file size” limit.