Turn on tracing to see if there are any places that processing stops. Do this by setting these values in the confgi/custom.config.ini file:
debugLevel = All
debugErrorReporting = E_ERROR
This will report information in the tmp/log/si.log file.
Note that secure information is reported in this file, so make sure any is obscured if you show this info in this forum.
Normally, when the unresolved loading happens, something is wrong with the data table information. Do make sure that you have the both the gdt and the intl extensions enabled in your php.ini file. You can verify this via the SI phpinfo.php file. To use this, modify the $secure setting to false. Then access this file by specifying /phpinfo.php after the SI https entry.