Hello.

I can not replicate issue on fresh install 1.1.9
see screenshot attached

But I remember this bug in old 1.1.4 or similar version. Do you have upgraded version on fresh installed?

Hi try to change this files
for storefront https://github.com/abantecart/abantecart-src/blob/master/public_html/storefront/controller/responses/product/review.php
for admin https://github.com/abantecart/abantecart-src/blob/master/public_html/admin/controller/pages/catalog/review.php

Easy search for 1000 text in this files 

Can you please download it again from you Downloads section and try to install again?
Try to open ac_promotions_v1.0.1.tar.gz archive on you PC, did you see files in archive?
You can contact marketplace support here

Ask user who post solution to help you

Hello.

Go to admin-extensions-order totals. enable Handling Fee and configure it for your needs

Hello.

Did you resolve your issue?
Also your error log speaks for itself

2014-06-05 10:15:42 - Cache directory is not accessible or writable.  Caching operation was skipped!

make sure your cache directory is writable and readable

Hello.
You need to give access to next controllers
   1   catalog/product   
   2   catalog/product_discount   
   3   catalog/product_extensions   
   4   catalog/product_files   
   5   catalog/product_images   
   6   catalog/product_layout   
   7   catalog/product_listing   
   8   catalog/product_options   
   9   catalog/product_promotions   
   10   catalog/product_relations   
   11   catalog/product_special   
   12   catalog/product_summary   
   13   catalog/product_tabs   
   14   common/resource_library   
   15   listing_grid/product   
   16   product/product
This work for me in AbanteCart 1.1.9