Custom module Error: SYSTEMCOMPONENT_CLASSNOTFOUND on OXID6

Hello all,
I want to ask if someone know how to fix following erros that I am getting when am trying to upgrade module to OXID 6:

[13 Dec 09:24:37.340320 2017] [exception] [type OxidEsales\Eshop\Core\Exception\SystemComponentException] [code 0] [file /var/www/html/oxideshop_ce/source/Core/UtilsObject.php] [line 222] [message EXCEPTION_SYSTEMCOMPONENT_CLASSNOTFOUND ebox_googlebase]

[13 Dec 09:24:37.340320 2017] [exception] [stacktrace] #0 [internal function]: OxidEsales\EshopCommunity\Core\UtilsObject->oxNew(‘ebox_googlebase’)

‘ebox_googlebase’ is class that extends oxAdminDetails.

Thank you.

Please see tipps in OXID 6 Modul Admin-Menü

It’s okay, there was error in metadata.php

Thanks a lot!

Also, one more question:

This:
$sQAdd = " from $sArtTable where 1 "; is not correct syntax in OXID6 anymore?

[message You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘from where 1 and .oxid = ‘oxexport’’ at line 1]

can’t you read error messages?
" from $sArtTable where 1 " becomes "‘from where 1 and .oxid = ‘oxexport’"
obviously $sArtTable is empty and also there is table name missing before the oxid field