Missing Template with ID 2005 - This website can't be displayed

Try these following steps to add the Template (as an admin)

• Go to Administration > Option > Tab E-Mail-Template:
Import the E-Mail Template (.../configuration/E-Mail-Template/Katalogansicht_Selbststudium_EMailTemplateExport_2019_05_29_15_11_13_958.xml.gz)
• Go to Administration > Administration > Tab Selection Admin
Import folowwing entry: insert;DE;ecadiaCorrespondenceTemplateType;2005;2005;Catalogue Selfstudy;Katalogansicht Selbststudium;