Update mislukt website weg

Help.
Ik heb zojuist de nieuwste versie van opencart gedownload, maar nu is mijn gehele website weg.

als ik nu naar mijn website ga, krijg ik dit: Kan iemand mij helpen ?


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Kun je iets duidelijker zijn, welke versie had je, naar welke vesie wilde je upgraden.
heb je voordat je ging upgraden alles gebackupt, zodat je altijd terug kunt naar de oude situatie ?

Ja ik had gelukkig een back-up dus alles is weer terug. Ik snap nog steeds niet waar het fout ging.

ik wel.
als je gaat updaten, moet je een vast patroon volgen,
in de admin zet je alle modules uit, betaal methoden uitzetten, verzend methoden uitzetten.
op je hosting alle bestanden behalve de config.php in root en admin verwijderen.
hierna alle nieuwe bestanden van oc 2.3.0.2 uploaden,
de upgrade uitvoeren.
hierna je site opnieuw opbouwen, alle benodigde extensies voor de nieuwe versie erin zetten, betaal methoden configureren verzend methoden configureren enz.