XCA Version 0.6.4 - Tab "Extensions"

Setting more then one URI for Authority Information Access causes following Error:

Der folgende Fehler ist aufgetreten:
error:2208B08F:X509 V3 routines:V2I_AUTHORITY_INFO_ACCESS:invalid syntax

How can I set more then one URI for AIA using "CA Issuer"? We need this feature to set the URI for our backup site and intranet site.