when I've tried to view blog http://example.com/blog getting this error
Fatal error: Class 'SSHTMLBBCodeParser_Filter_Basic' not found in sapphire\parsers\HTML\HTMLBBCodeParser.php on line 224
on the top of it, when installed forum modules, getting following warnings
Warning: Warning: there are two 'BBCodeParser' files: 'sapphire/parsers/BBCodeParser.php' and 'forum/code/BBCodeParser.php'. This might mean that the wrong code is being used. in sapphire\core\ManifestBuilder.php on line 153
Warning: Warning: there are two 'TextParser' files: 'sapphire/parsers/TextParser.php' and 'forum/code/TextParser.php'. This might mean that the wrong code is being used. in sapphire\core\ManifestBuilder.php on line 153
The warnings are because we used to have the BBCode parser in the forum module, In 2.1.0 we recognized that now the BBCode parser is used in the blog module aswell so we moved it to sapphire. We haven't updated the forum module yet as SilverStripe 2.0.2 is still our stable release and that doesn't have the BBCode parser in its core as yet.
Just remove those 2 files from the forum/ module it should still work fine.