nextcloud snappymail does not load after upgrade to 2.37.0

[HenkVirtual]

error as below

Please refresh the page and try again.SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data

[JonTabor]

I just ran across this as well. I can't seem to come up with anything useful when enabling debug logging, either.

Here's the exact error I get:
An error occurred.
Please refresh the page and try again.
SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON

So far I have been unable to track this down. Usually I see this when something returns HTML when it was expecting JSON, but so far I haven't found anything useful.

[the-djmaze]

Nextcloud has a bad habbit of failing update tasks.
Nextcloud keeps switching between apps and custom-apps and there's only one thing you can do:

Go to /nextcloud/settings/admin/additional
Then go back to /nextcloud/apps/snappymail/ or /nextcloud/custom_apps/snappymail/

Nextcloud bugs are outside our development scope and this specific issue is already reported here several times and i can't reproduce them in my Nextcloud instances.

[the-djmaze]

An error occurred. Please refresh the page and try again. SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON_

Correct!
The file does not exist on that location, see your developer tools network requests for the "404 Not Found" mess that Nextcloud creates.

[HenkVirtual]

admin/additional

unfortunately my nc 29. is generating the same error on the snappy admin page, even after server restart;
An error occurred.
Please refresh the page and try again.SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data

[JonTabor]

An error occurred. Please refresh the page and try again. SyntaxError: Unexpected token '<', "<!DOCTYPE "... is not valid JSON_

Correct! The file does not exist on that location, see your developer tools network requests for the "404 Not Found" mess that Nextcloud creates.

Yeah, I was looking for 404s in the dev tools, but there are none. Just a long string of 200s. The workaround above doesn't work for me, so I'm thinking this is a different issue.

[HenkVirtual]

mm I removed snappymail from the apps and installed it again, but I am getting the same error also with 2.37.1
where is this error pointing to ? [unexpected character at line 1 column 1 of the JSON data]
is it possible that after removel that there is something left in the database ?
running Nextcloud Hub 8 (29.0.4)

[the-djmaze]

That's because Nextcloud is serving an HTML document instead.
So Nextcloud does not serve a 404, but just throws a 200 with HTML.

And SnappyMail needs JSON.

I will modify the fetch code to detect this misbehavior.
It will not solve it, but should give more insight then.

[the-djmaze]

I found an issue due to O365 login!
47d18ca#r144395031

So in this case it was my fault 😱

[JonTabor]

I found an issue due to O365 login! 47d18ca#r144395031

So in this case it was my fault 😱

Microsoft causing problems for people? Color me shocked.

Nice find! And thanks for looking into it for us!

[the-djmaze]

Microsoft causing problems for people? Color me shocked.

I'm not eligible for a Pwnie Award like CrowdStrike.

[joshtrichards]

Nextcloud has a bad habbit of failing update tasks.

Nextcloud keeps switching between apps and custom-apps and there's only one thing you can do:

Go to /nextcloud/settings/admin/additional
Then go back to /nextcloud/apps/snappymail/ or /nextcloud/custom_apps/snappymail/

Nextcloud bugs are outside our development scope and this specific issue is already reported here several times and i can't reproduce them in my Nextcloud instances.

Hey @the-djmaze - Josh here (a member/contributor over at the Nextcloud project). I'm not clear what bug this is referencing.

Is there some situation where a URL is hard coded in Snappy or something?

In Nextcloud, the apps_paths are defined by config not hardcoded. Any number of apps paths are valid and admins can name them whatever they want.

https://docs.nextcloud.com/server/latest/admin_manual/apps_management.html#using-custom-app-directories

By convention several of the installation methods (like our micro-services and AIO Do keep images) do use apps/ for shipped apps and custom_apps/ for app store installed apps, but that's entirely arbitrary.

[the-djmaze]

Hi @joshtrichards somehow Nextcloud switches the path.
When you have /apps/snappymail then after upgrade it is /custom_apps/snappymail (or viceversa).

Snappymail stores the path in application.ini so after upgrade it fails.

Also people seem to have multiple installations of Snappymail after that.