Credential Help Selector

[Mila_Lupehina]

Hi there

I'm new to Sourcetree and I think I've made a mistake. 

Basically, Helper was always popping up when I pushed my repository and it was getting on my nerves.  So I just marked to always use the chosen one. Since then I cannot push local repository at all. I need to log in every time but it does not work anyway with the same massage every time.

I tried to search for information on the net but found almost nothing useful. Maybe experienced help can assist to manage my issue.

Can you advise me something to fix it?

I attach screenshots of everything that popped on during this all.

Thank you in advance.