Vlookup Error in StudioX

Hi,
Am new to UiPath and learning by watching the Academy videos.

Am trying to build a matching excel activity. In this, i have a details file, which has the Account Number column. I need to get the Account Name, Cost Center & Cost Center name from a Master File and the common link between Details & Master file is the Account number.

I gave the below Vlookup activity, however the bot doesnt update the Account Name, Cost Center & Cost Center name columns from Master sheet and activity just closes. There is no error either.

Below is the screenshot