Error when deployng shinyapp to server directory 'ERROR: An error has occurred. Check your logs or contact the app author for clarification.'

I am trying to host a shiny app in a directory. I can already see the sample hello app fine and even created a new faux up using using the template within rstudio when clicking to create a new shiny app (Old Faithful Geyser Data). When I add this app to /srv/shiny-server/my_test_app and then navigate to <our ip>:3838/my_test_app I do indeed the app.

However, when I move my actual app I get this message in my browser:

ERROR: An error has occurred. Check your logs or contact the app author for clarification.

There seems to be several posts on here already about this message. The problem is I cannot see any error messages in the logs.

ls -l /var/log/
total 712
-rw-r--r-- 1 root  root   30407 Apr  8 16:56 alternatives.log
drwxr-xr-x 1 root  root    4096 Apr  8 16:56 apt
-rw-rw---- 1 root  utmp       0 Mar 27 00:00 btmp
-rw-r--r-- 1 root  root  340456 Apr  8 16:56 dpkg.log
-rw-r--r-- 1 root  root   32032 Apr  2 23:31 faillog
-rw-r--r-- 1 root  root    2235 Apr  2 12:11 fontconfig.log
-rw-rw-r-- 1 root  utmp  292292 Apr  2 23:31 lastlog
drwxr-xr-x 2 root  root    4096 Apr  2 12:27 rstudio-server
drwxr-xr-x 2 shiny shiny   4096 Apr  8 17:40 shiny-server
-rw-r--r-- 1 root  root     721 Apr  2 23:56 shiny-server.log
-rw-rw-r-- 1 root  utmp       0 Mar 27 00:00 wtmp

First I looked at shiny-server-log:

cat /var/log/shiny-server.log
[2020-04-02T23:32:04.187] [INFO] shiny-server - Shiny Server v1.5.7.890 (Node.js v8.10.0)
[2020-04-02T23:32:04.190] [INFO] shiny-server - Using config file "/etc/shiny-server/shiny-server.conf"
[2020-04-02T23:32:04.270] [WARN] shiny-server - Running as root unnecessarily is a security risk! You could be running more securely as non-root.
[2020-04-02T23:32:04.273] [INFO] shiny-server - Starting listener on
[2020-04-02T23:56:27.900] [INFO] shiny-server - Created bookmark state directory: /var/lib/shiny-server/bookmarks
[2020-04-02T23:56:27.900] [INFO] shiny-server - Created user bookmark state directory: /var/lib/shiny-server/bookmarks/shiny

I'm not sure where else to look.

My config:

cat /etc/shiny-server/shiny-server.conf
# Instruct Shiny Server to run applications as the user "shiny"
run_as shiny;

preserve_logs true; # I only added this after finding a suggestion online to do so (I'm in a docker container)

# Define a server that listens on port 3838
server {
  listen 3838;

  # Define a location at the base URL
  location / {

    # Host the directory of Shiny Apps stored in this directory
    site_dir /srv/shiny-server;

    # Log all Shiny output to files in this directory
    log_dir /var/log/shiny-server;

    # When a user visits the base URL rather than a particular application,
    # an index of the applications available in this directory will be shown.
    directory_index on;

How can I see the error messages and where Shiny is failing?

Shiny stores independent log files for each app on this path /var/log/shiny-server, look there and share the content of the corresponding log for your app.

I see them in there now and I see what the issue was:

Error: The default Google Cloud Project for googleAnalyticsR is intended
for evalutation only, not production scripts.Please set your own and client.secret via googleAuthR::gar_set_client()

I now know where to go from here, thanks

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