Error after upgrading from 7.5 to 8.1

[Wolf Goebel]

After upgrading from 7.5.2 to 8.1, started getting the below error messages. Tried 2 approaches, first doing an upgrade and then installing from scratch in a new server and restoring from a backup, both with the same results.

Details
Exception: Uncaught ReferenceError: Calendar is not defined
Resource: http://its-jira2.its.local:8080/s/d41d8cd98f00b204e9800998ecf8427e-CDN/-no5gy6/801000/af023728cc398b714cc6b1d6df18162a/1.0/_/download/batch/jira.webresources:calendar-en/jira.webresources:calendar-en.js
Line: 15
Column: 1
Exception: Uncaught Error: No jira/libs/calendar
Resource: http://its-jira2.its.local:8080/s/c63935245ef0f9698a1a3529bf533694-CDN/-no5gy6/801000/af023728cc398b714cc6b1d6df18162a/5435cf25f409c0ae2e20397b08c1e337/_/download/contextbatch/js/_super/batch.js?locale=en-US
Line: 25
Column: 977
Exception: Uncaught Error: undefined missing jira/projects/sidebar/sidebar-placeholder-initializer
Resource: http://its-jira2.its.local:8080/s/c63935245ef0f9698a1a3529bf533694-CDN/-no5gy6/801000/af023728cc398b714cc6b1d6df18162a/5435cf25f409c0ae2e20397b08c1e337/_/download/contextbatch/js/_super/batch.js?locale=en-US
Line: 25
Column: 1967
Environment
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36
Stack trace
ReferenceError: Calendar is not defined
at http://its-jira2.its.local:8080/s/d41d8cd98f00b204e9800998ecf8427e-CDN/-no5gy6/801000/af023728cc398b714cc6b1d6df18162a/1.0/_/download/batch/jira.webresources:calendar-en/jira.webresources:calendar-en.js:15:1

The log file shows:

410x1234x1 c5r24a 192.168.143.87 /secure/RapidBoard.jspa [c.a.p.web.model.ResourceTemplateWebPanel] Error rendering WebPanel (com.atlassian.jira.jira-projects-plugin:sidebar-project-shortcuts/JIRA.Projects.Sidebar.ProjectShortcuts.Templates.content): Unable to compile Soy templates

and 

Caused by: com.atlassian.soy.renderer.SoyException: Unable to compile Soy templates at: com.atlassian.jira.jira-projects-plugin:sidebar-project-shortcuts

[Wolf Goebel · Accepted solution]

Taking a more in-depth look at the atlassian-jira.log file, I found out that the core of this error was that the soy system plugin (app) wasn't enabled after the restore process. Enabling it, solved the issue.

[JP _AC Bielefeld Leader_]

Hi Wolf,

could this be related to an AddOn / App? Did you try a safe start without any addons enabled?

https://confluence.atlassian.com/jirakb/add-on-tips-and-tricks-779168621.html

Best

JP

[Wolf Goebel]

Actually, after a lot of tinkering, found out that the soy system app was disabled, so as the hipchat. After enabling them, all is fine!