Need Working R+L Carriers Freight Shipping M2 Extension To Get Live Rates

We have Magento 2.1.9 multi-store installation on Centos 6.9 We have just installed free Magento2 R+L Carriers Freight Shipping Extension from Magento Marketplace ([login to view URL]) We also have an account R+L Carriers ([login to view URL]) So, we have access to R+LCarriers API Unfortunately, despite putting our API credentials at R+L Carriers Freight Shipping Magento 2 extension settings, we can`t get live rates. The extension doesn`t work. We also tried on fresh and with no extension, Magento 2.1.9, again didn`t work. We need someone to fix problems with this extension and want it to work. We need to get live freight shipping rates from R+L carriers API. Here are our environment details: 1. Magento version 2.1.9 2. CentOS release 6.9 3. Apache/2.2.34 4. mysql Ver 14.14 Distrib 5.6.36-82.0 5. Redis server v=2.8.4 6. PHP 7.0.28 (FPM/FastCGI) 7. memcached 3.0.3 8. varnish-4.1.2 We want to solve getting live rates from R+L carriers issue as soon as possible and quickly. Please remind that we favor soonest solving date proposals.