New installation: 500 error with data-importer (Firefly works fine)

[ecarlevaro]

I did a fresh installation following the guide on self-managed server https://docs.firefly-iii.org/how-to/data-importer/installation/self-managed/

Firefly runs fine, and it is working on
http://firefly-iii.test
http://127.0.0.1:80
(I set up a virtual host on Apache)

Then I installed data-importer. When I open
http://localhost/data-importer/public
or the virtual host
http://data-importer.test
I get a 500 Internal server error

The file .env I tried
FIREFLY_III_URL=http://firefly-iii.test
VANITY_URL=

FIREFLY_III_URL=http://firefly-iii.test
VANITY_URL=http://firefly-iii.test

FIREFLY_III_URL=http://localhost/firefly-iii/public
VANITY_URL=http://firefly-iii.test

FIREFLY_III_URL=http://localhost/firefly-iii/public
VANITY_URL=http://localhost/firefly-iii/public

I also tried deleting all virtual hosts. I can access Firefly on
http://localhost/firefly-iii/public
and then
FIREFLY_III_URL=http://localhost/firefly-iii/public
VANITY_URL=
with no result. I also tried adding
ASSET_URL=/data-importer

access.log in Apache shows
::1 - - [05/Jan/2025:11:35:07 +1030] "GET /data-importer/public/ HTTP/1.1" 500 6609

How can I debug this? Any log file to look at?

My setup is laragon 6.0 on Windows 11 Pro 24H2 with

Apache 2.4.52-win64-VS16
MySQL mysql-8.0.30-winx64
PHP 8.3.15-nts-Win32-vs16-x64

[JC5]

https://docs.firefly-iii.org/how-to/general/debug/