Question on respec error message

Felix Sasaki <[email protected]> Thu, 28 Apr 2016 12:33:49 +0200
Newsgroups gmane.org.w3c.specifications
Message-ID <[email protected]>
Hi all,

I am getting with this file
https://www.w3.org/2016/04/ontolex/
the respec error message 
„[TypeError] t[0] is undefined"

and the below info:

.run/<@http://www.w3.org/Tools/respec/respec-w3c-common:18:17401
.each@http://www.w3.org/Tools/respec/respec-w3c-common:8:480
ae.prototype.each@http://www.w3.org/Tools/respec/respec-w3c-common:7:30456
.run@http://www.w3.org/Tools/respec/respec-w3c-common:18:16770
.runAll/</i</<@http://www.w3.org/Tools/respec/respec-w3c-common:10:23247
.runAll/</i<@http://www.w3.org/Tools/respec/respec-w3c-common:10:23215

Does anybody have an idea what the reason may be?

Thanks,

Felix