Drupal 8.x

Hi guys,

in the option of creating events where participants pay participation fees, I stumbled upon the drupal rng module in version 3.0.0-alpha that I installed on drupal 8.8.6. except that I have a lot of problems with this module. with after creating a type of event content that I associated with the event type of rng. when i create an event with the register button when i click on it i get this error

When I edit content or use anything in the admin/back end rather than seeing all the normal tabs 

View | Edit | Display field | Delete

I just see one of the tabs and the others all go off to the right.

OK, I need someone to "check my math" here. I'm not sure where I'm gone awry.

Hi,

I'm trying to install composer installers

[tdrupal@vaiu drucomp885]$ composer require --prefer-dist composer/installers
Using version ^1.9 for composer/installers
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.