Domain AWstats statistic page displays
404 error when trying to change the statistics period for IIS-based website (click on the images below to get an example)
Perl support is disabled for the affected domain.
AWStats engine for Windows requires the Perl for executing and calculation. Since the Perl support was turned off, AWStats internal processes could not be executed.
Enable Perl support in the hosting settings of the domain under
CCP > Websites > domain.tld > Open in Control Panel > Websites tab > Hosting settings