[TYPO3-calendar] Missing "renderType" in TCA of field "[tx_cal_location][country]"

[Laurie]

Hello list,

when adding a location I get the following typo3 exception.

#1431452406: Missing "renderType" in TCA of field 
"[tx_cal_location][country]".

I am using
Typo3 7.6.15
Cal 1.11.0
PHP 7

Appreciate any help.

Laurie