The issue is when displaying a workflow in process assembly, the panel does not show any objects. You can hover over the blank area and the cursor would identify an object present but just not displayed.
This issue is intermittent.
Automic V 21.0.x and V 24.x
Configuration
Follow the below resolution steps to resolve the issue.
<filter>
<filter-name>httpHeaderSecurity</filter-name>
<filter-class>org.apache.catalina.filters.HttpHeaderSecurityFilter</filter-class>
<!-- 1126hours enable below not causing a problem -->
<init-param>
<param-name>hstsEnabled</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>hstsMaxAgeSeconds</param-name>
<param-value>31536000</param-value>
</init-param>
<!-- 1128hours enable below not causing a problem -->
<init-param>
<param-name>hstsIncludeSubDomains</param-name>
<param-value>true</param-value>
</init-param>
<async-supported>true</async-supported>
</filter>
To:
<filter>
<filter-name>httpHeaderSecurity</filter-name>
<filter-class>org.apache.catalina.filters.HttpHeaderSecurityFilter</filter-class>
<!-- 1126hours enable below not causing a problem -->
<init-param>
<param-name>hstsEnabled</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>hstsMaxAgeSeconds</param-name>
<param-value>31536000</param-value>
</init-param>
<!-- 1128hours enable below not causing a problem -->
<init-param>
<param-name>hstsIncludeSubDomains</param-name>
<param-value>true</param-value>
</init-param>
<async-supported>true</async-supported>
<init-param>
<param-name>antiClickJackingEnabled</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>antiClickJackingOption</param-name>
<param-value>SAMEORIGIN</param-value>
</init-param>
</filter>
These lines are needed in order for HSTS to work for Tomcat:
<init-param>
<param-name>antiClickJackingEnabled</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>antiClickJackingOption</param-name>
<param-value>SAMEORIGIN</param-value>
</init-param>
After the change, please restart tomcat server and the workflow display will be working fine now.