Publicado originalmente por RedworkDE:

Most likely click the i forgot my password or account name link, because as the error message says you provided "invalid login credentials", ie either username and password are wrong.

Thanks you really much. It really worked! :D

Publicado originalmente por RedworkDE:

This is a not an issue with our site, but with steam. See this help article for more info: https://help.steampowered.com/de/wizard/HelpWithLogin

and what should I do now? There is no help for this problem. I thought someone here could help me maybe

I want to login through steam in the modding of isaac site and I made everything right but it says
"invalid login credentials" what is this how can I stop it?

I downloaded a mod which I got as .rar file. I wanted to extract this to my recourse folder, but I couldn´t. I downloaded 7Zip, but I didn´t know what I should to. I tried to open it, but I couldn´t extract the folder I got then. Can somebody help me?