someone seen this before :

The above error occurred when loading "shadow.module.app.append.js". Any additional errors after that one may be the result of that failure. In general your code cannot be trusted to execute properly after such a failure. Make sure to fix the first one before looking at others.

I see this when I start the project like this :

npx shadow-cljs watch app

I do not see any error mentioned above

@roelof this is a warning explicitely referencing "the above error". so without knowing the above error we cannot tell you anything else about what is actually wrong 😛

there must be an error above. maybe you have it filtered in the chrome console or so?

there should be a red error console entry and the yellow one below that you pasted

since it is in the "append" file I would assume that maybe your :init-fn threw an error

I have found the errors :

@roelof You seem to be subscribing to an unregistered subscription which always results in a “hard crash”