For now everything working i had to change and add few things i will list them below for others who will have my issues.
For "500: Internal Error" i change the ucp.php file permission to 644 and purged the cache.
I also have to add below lines to Exclude URLs:
By the way my site running phpBB software.
I also have to change Http:// to Https:// as my forums using SSL Certification.
Your Sitemap URL: Https://
Starting URL: Https://