I have a very strange bug to report.

The message "Error communicating to server! Server Error" will appear in the Delivery Pipeline view if:

• the Maven Integration plugin is disabled and
• the Static Analysis Utilities plugin is enabled and
• the job displayed in the Delivery Pipeline has at least one build.

Reproduction steps :

• Start from clean install
• Install Static Analysis Utilities plugin
• Install Delivery Pipeline plugin
• Create a new Freestyle job
• Add a Delivery Pipeline view and assign it to the job
• Right now, the pipeline works perfectly well, you can build the job as many times as you want and it will display properly in the pipeline (image 1)
• However, if you disable the Maven Integration plugin, you will encounter the error message (only if you built the job at least ONCE, else nothing happens) (image 2)
• If after disabling the Maven Integration plugin, you also disable the Static Analysis Utilities plugin, then it works again.

Note that:

• the Static Analysis Utilities plugin is an OPTIONAL dependency of the Delivery Pipeline plugin
• the Maven Integration plugin is an OPTIONAL dependency of the Static Analysis Utilities plugin