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Hello everyone,  

I recently encountered a strange problem with my PrestaShop store:  
- The back office login page loads fine,  
- but after entering the correct username and password, it just reloads without logging me in.  

I have already tried:  
- Clearing cookies and cache,  
- Using different browsers,  
- Checking PHP version and server error logs.  

Has anyone faced the same issue before? Is this usually caused by session/cookie settings, or something else with hosting configuration?  

I found a detailed guide that tries to explain multiple scenarios of this problem (quite long and technical), so I put it here in case anyone wants to look deeper see more