Drupal 8.x

I've decided on using Bitnami to automate much of the installation process for a Drupal 8 dev environment. I've installed the UberCart and Admin_menu modules, but when I attempt to access the checkout section of UberCart configuration, I get the following error:
Fatal error: Call to undefined function Drupal\uc_cart\Form\theme() in C:\xampp\apps\drupal\htdocs\modules\ubercart\uc_cart\src\Form\CheckoutSettingsForm.php on line 261. I've checked the file, but as I am newer to PHP, so I cannot attempt to solve the issue myself.

I have tried so many maps modules in drupal 8. But no one gonna work out. I have to add maps in my drupal 8 site like - http://www.drupical.com/
main map should contain all the markers of any content. And on the right side there will be link for each one. Likewise the store locator module in drupal 7
Any suggestions??

In Drupal 8, the hook_stream_wrappers() doesn't not exist. How can I register a new Druapl stream wrapper?

I'm new to Drupal and am spending time learning its ins and outs on a local XAMPP server before doing some serious work with it. I have found that Views can be used to list pages of certain content types, and one can make pages or blocks from views. Blocks seem to be related to page regions.

Hi, I was going to use the Twitter module for Drupal 8 because I had some good experience with it for D6. So I downloaded Twitter and the Oauth module as usual but then I saw that you need the PECL Oauth library from http://www.php.net/manual/en/install.pecl.php. A bit confused, so I asked my host provider and they couldn't do anything about this. Well, that was a sad moment. Why must this module suddenly be dependent of something from Pear repository that you need to install on your server.

Hello,
I install the module ldap in drupal 8 and i need de number module. But, i don't find this module in this web. Besides google search.
Can help me to find the url to module??

Thanks