The button's tooltip header is missing, and the tooltip text is being supplied as as the header, with no tooltip text after.
follower/Ardia.js line 3705.
addButton(3,"Escape!",ardiaGetToTheChoppaIMeanShip,"You’ve freed both groups of slaves, so it’s time to get Ardia the hell out of here.");
this suggests that a problem exists with engine/interface.js at line 129
if (ttH !== undefined && ttB === undefined)
{
Log(LogCategory.UI, LogDetail.Fatal, Potential erroneous button configuration detected. Button '${text}' specifies a tooltip header '${ttH}' but no body!
);
this should be triggering a fatal error as only 4 arguments are supplied when 5 should be, and the fifth argument should meet the qualification of "===undefined" but this isn't happening.