IndexOutOfBoundsException when trying to expose backend soap service as REST API

[prats2017]

Not sure how to move issues between different categories. So creating a new issue her and linking it to one i created before.

wso2/product-apim#5534 (comment)

[prats2017]

As suggested I took update wso2am-2.6.0 but error still persists.

[2019-09-12 10:48:10,982] DEBUG - SolrClient Solr index queried query: q=+TO+&rows=12&fq=tenantId%3A%5C-1234&fq=allowedRoles%3A%28application%5C%2Fadmin_eti_production+OR+internal%5C%2Fsubscriber+OR+application%5C%2Fadmin_countries_sandbox+OR+internal%5C%2Fcreator+OR+application%5C%2Fadmin_app_production+OR+internal%5C%2Fpublisher+OR+internal%5C%2Feveryone+OR+admin+OR+application%5C%2Fadmin_eti_sandbox+OR+application%5C%2Fadmin_app_sandbox+OR+application%5C%2Fadmin_countries_production%29&fq=mediaType_s%3Aapplication%2Fvnd.wso2-api%2Bxml&start=0&sort=overview_name_s+asc

[2019-09-12 10:48:18,633] ERROR - add:jag org.mozilla.javascript.WrappedException: Wrapped java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 (/publisher/site/blocks/item-design/ajax/add.jag#221)
at org.mozilla.javascript.Context.throwAsScriptRuntimeEx(Context.java:1754)
at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:148)
at org.mozilla.javascript.NativeJavaMethod.call(NativeJavaMethod.java:225)