So, I have installed like 5 times, same issue... The login button just wouldn't work after putting the right username/password.
It looks like javascript can't run or something like that?
The thing is I have installed 2-3 times on other domains using the same server before, they just worked.
I read somewhere about 'auth_type' => 'form', which I changed, still can't make it work.
I asked the hosting guy, he said he doesn't know FreshRSS.
Please help.