Setting external sites app as defaultapp not working since NC 31

Hi,

for the last 5 years all our users hat the external sites app as default which opened the first external sites app (id1). With NC 31 there seems to be a change which ignores our line

'defaultapp' => 'external',

in the config.php. I also tried to set an external app as defaultapp via gui settings / design… which throws this error:

I can select any other app as default app there but not an external sites app.

Does anyone have an idea how to solve this other than redirecting / via the webserver to /external/1 ?

Did you check the logfiles? There might be something failing when it is trying to load the app.

Yes, I can’t find anything within the logs and the external sites are working like before when accessing them via the icon bar.

They changed something:

It was done by people working with external, so it should be fixed. Perhaps go through the discussion, not sure if the changes require any other changes (e.g. when some people don’t have access to the app…).
If nothing applies, I’d check directly with the app developers of the external app. Especially if it breaks a function like that between versions.