Problem creating New Account in SuiteCRM 7.6.6

I am not sure if this is a bug or a setup issue but I just installed SuiteCRM 7.6.6 RC with demo data and although the installation went very smooth and everything looks OK when I try to create a new Account I get the following error:
I have searched the forum and Google but had no success.

Fatal error: Smarty error: [in cache/modules/Accounts/EditView.tpl line 81]: syntax error: unrecognized tag ‘main’ (Smarty_Compiler.class.php, line 590) in /home/athos/xampp_htdocs/SuiteCRM-7.7-rc/include/Smarty/Smarty.class.php on line 1094

Time Memory Function Location

1 0.0002 242632 {main}( ) …/index.php:0
2 0.1316 15204200 SugarApplication->execute( ) …/index.php:52
3 0.1610 18160064 SugarController->execute( ) …/SugarApplication.php:105
4 0.1635 18607800 SugarController->processView( ) …/SugarController.php:310
5 0.1692 19467640 SugarView->process( ) …/SugarController.php:363
6 0.2242 23142720 ViewEdit->display( ) …/SugarView.php:160
7 0.2394 23935352 EditView->display( ) …/view.edit.php:87
8 0.2407 23990680 TemplateHandler->displayTemplate( ) …/EditView2.php:741
9 0.4226 25122728 Sugar_Smarty->fetch( ) …/TemplateHandler.php:294
10 0.4226 25123032 Smarty->fetch( ) …/Sugar_Smarty.php:131
11 0.4227 25139928 Smarty->_compile_resource( ) …/Smarty.class.php:1276
12 0.4228 25298264 Smarty->_compile_source( ) …/Smarty.class.php:1437
13 0.4230 25457896 Smarty_Compiler->_compile_file( ) …/Smarty.class.php:1504
14 0.4487 26344496 Smarty_Compiler->_compile_tag( ) …/Smarty_Compiler.class.php:312
15 0.4489 26346120 Smarty_Compiler->_syntax_error( ) …/Smarty_Compiler.class.php:590
16 0.4489 26346224 Smarty->_trigger_fatal_error( ) …/Smarty_Compiler.class.php:2263
17 0.4489 26346520 Smarty->trigger_error( ) …/Smarty.class.php:1830
18 0.4490 26347096 trigger_error ( ) …/Smarty.class.php:1094