Can not export clients created on RH-SSO 7.1 when upgraded to RH-SSO 7.2

Issue

When clients, with protocol mappers enabled, are created on RH-SSO 7.1 they are not able to be exported on RH-SSO 7.2, and the message below is shown on browser console.

TypeError: Cannot read property 'length' of undefined
    at m.$scope.exportClient (clients.js:768)
    at fn (eval at compile (angular.js:15551), <anonymous>:4:229)
    at e (angular.js:27341)
    at m.$eval (angular.js:18423)
    at m.$apply (angular.js:18523)
    at HTMLTableCellElement.<anonymous> (angular.js:27346)
    at HTMLTableCellElement.dispatch (jquery.min.js:3)
    at HTMLTableCellElement.q.handle (jquery.min.js:3)
(anonymous) @ angular.js:14700
(anonymous) @ angular.js:11142
$apply @ angular.js:18528
(anonymous) @ angular.js:27346
dispatch @ jquery.min.js:3
q.handle @ jquery.min.js:3