Am trying to add a Design & Block Template in a Global Area. When I select this option all controls become unavailable. This is likely, because a jQuery error is thrown. This is it (I obfuscated the domain name with xxx) as taken from the Inspector:
GET https://xxx/concrete/js/jquery.js?ccm_nocache=1d463a94354892a3be95dcca13f94abcbd2779b9 https://xxx/index.php/ccm/system/dialogs/block/design?cID=221&arHandle=Main&arGridMaximumColumns=&arEnableGridContainer=0&aID=20&bID=33 500
So it is a HTTP 500 as seen at the end.
Is this known or is there another way I could assign a block template?