Wierd login issue

Hi, there. I’ve stumbled upon a weird login issue while trying to setup custom base_url with mod_rewrite. The thing is that login fails with no error, the links to change locale [https://srl.si/user/setLocale/en_US?source=%2F] also have no effect.

My setup is:

base_url[index] = “https://ojs.srl.si
base_url[srl] = “https://srl.si
base_url[jsl] = “https://www.jezikinslovstvo.com
restful_urls = Off

The Apache 2.4 rewrites are done as follows

Alias “/ojs3” “/var/www/servers/ojs3_root”
##my ojs 3 install is outside document root linked by alias
##index redirection if host matches ojs.srl.si
<Directory “/var/www/servers/srl”>
RewriteCond %{HTTP_HOST} ^ojs.srl.si$ [NC]
RewriteRule ^(.*)$ /ojs3/index.php/index/$1 [L]
RewriteRule (.*) /ojs3/index.php/srl/$1

As far as accessing index and srl journal site, everything works as expected, but anything beyond accessing frotend fail without error. Nothing in error logs, just occasional 404 in access log. I suspect that api calls in the background are not being forwarded as they should, but for some strange reason I can not enable rewrite log on my Apache, so i’m in the dark. I’ve been struggling with this for days now, so any hint will be much appreciated?