"TypeError: Cannot call method 'on' of undefined", source: ionp:/src/frameworks/commo

I have a problem with one particular Architect project. When I open the project with Architect 3.0.4.1386, initially it is able to display the one and only top-level view in the project without problems or error messages. That view is a form panel. However, when I click the "Code" button in the top right corner of the canvas, and after that click the "Design" button next to it to go back to the design view, I get this error in the Log panel:

• Category: Design View


• Message: Framework Error: Cannot call method 'on' of undefined

Also, the view is not shown in the design view anymore. The canvas is empty. If I close Architect and re-open it, I can see the panel again in the design view correctly. But after going to the code view once and back to design view, it is not able to display the panel anymore. I can work in the design view, but every time I need to go to the code view, I must restart before I can work in the design view again.



In ~/.local/share/Sencha/Sencha Architect 3.0/runtime/sdp-1.3.0.803/debug.log I get this message:

Code:

---

[27222:27222:0407/145831:4764917635251:INFO:CONSOLE(191)] "TypeError: Cannot call method 'on' of undefined", source: ionp:/src/frameworks/common/canvas/AbstractViewHelper.js?_dc=1396871614331 (191)

---

I can't find any detailed information about where the problem might be. The page works just fine when I preview it in a web browser.



I would like to find out the reason for this. Can anybody give me a hint what to look for? Should I file this as a bug? I don't have a minimal example because I don't know what is causing this.