When I install Laravel in Ubuntu, that information comes out, I have inserted the following command to perform the installation:
sudo composer create-project --prefer-dist laravel/laravel
EYE: I have PHP 7.1 installed.
When I install Laravel in Ubuntu, that information comes out, I have inserted the following command to perform the installation:
sudo composer create-project --prefer-dist laravel/laravel
EYE: I have PHP 7.1 installed.
Try reinstalling the php-mbstring extension,
sudo apt-get install php-mbstring
Then you deactivate it and activate it again using phpenmod/phpdismod
sudo phpdismod mbstring # disable mbstring extension
sudo phpenmod mbstring # enable mbstring extension again
In the case that you are using windows, which I do not recommend, you should remove the enable this extension in the configuration file .ini
I hope you can help,