It appears that Witberg meter has gone missing on the online metering.

The overview screen only shows the first 20 meter accounts.
To access all the meter accounts, you can click on the link "all" underneath the first 20 entries.
To find a specific meter account you can click on more.

I still could not find Witberg , please can you make sure it is reinstated with the Eigenon sites

What login are you using?
if you want to change the permissions on a specific login,
select that login in the overview screen (using an administrator account)
and select Edit->Role
Under, "Specify which Entities may be Accessed" you can add the Witberg Meter Account.