today suddenly we got error on every hook attached to app engine 

{

"error": "BLRuntimeError",

"description": "The Business Logic script has a runtime error. See debug message for details.",

"debug": "ReferenceError: onPreSave is not defined"

}

and i found that the url of the app engine is not saved, and when i tried to add it the web console crashed.

Elnaqah,

Can you please provide the code that is causing this error?

Thanks,

any request to collection hooked to app engine 

Elnaqah:

I just attempted this and I am unable to recreate the error at this time,  can you please provide me with more clear steps to reproduce?

Thanks,

now i can't add app engine url to the hook the web console crash each time , i add the url to the hook

Elnaqah:

I am still unable to reproduce this issue, can you please take screenshots, a video, or provide steps to reproduce this?

Thanks,

attached video for the problem 

attached a video for the problem 

this is a screen shoot for the error returned when  a post request sent to a collection hooked to app engine on preserve

Thank you for the additional information Elnaqah, we'll do some digging on this and get back to you.

thank you for the support , this case is a disaster for us.

Elnaqah:

Rather than leaving the text area blank, can you please place the default text in there and try hitting save

function onPreSave(request, response, modules) {

}

Thanks,

yes it worked.
thanks .

but can i ask what made the app engine hook change ?

Elnaqah:

I don't think that anything changed, it looks like you uncovered an existing error.   

Thanks,