I believe its related to AEM bi-directional asset referencing: Managing Compound Assets

Here is something that could possible help you find a reason for this exception.In your system console (/system/console/slinglog) add a new logger for com.day.cq.wcm.core.impl.warp.TimeWarpResourceResolverSet log level to trace.Then try to use timewarp feature to switch versions.When an error occurs check your log file for something like:12.07.2018 15:20:06.155 *TRACE* [10.1.5.37 [1531423206099] GET /editor.html/content/xxxx/xxx/xxx.html HTTP/1.1] com.day.cq.wcm.core.impl.warp.TimeWarpResourceRe...

changedata-payloadpath="<%= xssAPI.getValidHref(payloadPath) %>" todata-payloadpath="<%= xssAPI.getValidHref(workitem.getWorkflow().getId()+"/data/metaData") %>"

Solved it by adding extraClientlibs="[cq.authoring.rte.coralui3,rte.coralui3]" on cq:dialog node

Just solved it. If anyone has an issue with dialog participant step not storing dialog entries with workitem metadata. I solved it by following naming convention for storing data in payload, BUT replacing payload path with work item metadata. You can do this by copying and overriding/libs/cq/inbox/gui/components/inbox/dialoginjection/render in /apps

danielgopo​Having same issue. Were you able to resolve your problem?