Question Trying to migrate subdomain from Apache/nginx to nginx only, receiving 404 on nodeJS

[basdebruin]

I have subdomain serving NodeJS apps only. Current setup is nginx proxy in front of Apache and I want to stop using Apache on this NodeJS serving subdomain. I unchecked the checkbox for proxy mode in the nginx setting in the subdomain. My "health check" route returns ok.

router.get("/health", function (req, res) {
res.json(getHealth());
res.end();
});

All my other routes are reached path like: https://mysubdomain.domain.nl/APP/vote-to-grpup (as an example) and I have nginx directives in place for all apps like:

location ^~ /VTG {
proxy_pass https://mysubdomain.domain.nl/;
proxy_set_header MondayApp "VTG";
}

I do get 404 on all app requests as if the proxy_pass is not working.

What am I doing wrong?