Error when to attach a file to User Model about laravel-attachments

[gabsource]

bcadd is provided by php-bcmath extension. You can enable the extension or use a different generator via the configuration item uuid_provider (must be a globally available function or a static from a class in the form Name\Space\Class@method).

[AEK-BKF]

Where can I enable the extension ?
I'm on ubuntu 16.04 , mariadb, php 7, Laravel 5.4

[gabsource]

If not already installed you need to install the extension package. I presume something like php7.0-bcmath. If the extensions is installed php7enmod bcmath will enable it (with sudo if not root).

Search for tutorials or howto, you'll easily find one for your system.

[Pes8]

Maybe the dependencies should be written in the readme ? Because I also got this error in a fresh LAMP installation (and now I've installed the extension)

[gabsource]

Thanks for reporting this. The extension dependency has been added here bnbwebexpertise/php-uuid@bab3be7

Now it should throw an error when trying to install on a PHP setup without the extension.