We are getting below error log when accessing workflow models from touch UI console and the model UI is blank.

This is OOTB workflow, not sure how to resolve this issue.

10.11.2020 06:48:34.518 *WARN* [204.153.122.4 [1604990914422] GET /libs/cq/workflow/admin/console/content/models.html HTTP/1.1] libs.cq.workflow.admin.console.components.item.workflowmodel.card.card$jsp Design time path not found for model with ID: /var/workflow/models/request_for_deactivation
10.11.2020 06:48:34.521 *ERROR* [204.153.122.4 [1604990914422] GET /libs/cq/workflow/admin/console/content/models.html HTTP/1.1] org.apache.sling.engine.impl.SlingRequestProcessorImpl service: Uncaught SlingException
java.lang.NullPointerException: null
at org.apache.jsp.libs.cq.workflow.admin.console.components.item.workflowmodel.card.card_jsp._jspService(card_jsp.java:498)
at org.apache.sling.scripting.jsp.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)