it looks a change has been made to the WA_CMS/WA_CMS.php file.
The error is saying that the function wa_getcmscontent() is declared twice in that file. Once at line 2 and again at line 68.
That file should only have 11 lines of code in it.
You should re-download the PowerCMS files from your download center and replace the WA_CMS/WA_CMS.php on your server with a fresh copy from the downloaded files.