Configuration error: missing PHP extensions

WIKINDX requires the following PHP extensions to work properly :

Extension Status
mysqliDISABLED
CoreENABLED
dateENABLED
fileinfoENABLED
gdENABLED
jsonENABLED
mbstringENABLED
sessionENABLED
SimpleXMLENABLED

Please install and enable them.

After that, refresh this page (with Ctrl+F5) or follow this link.