I deleted all cookies, cleared cache and enabled cookies both in Safari and in Chrome. Not working. I keep getting the same error again and again, saying :
“ERROR: Cookies are blocked or not supported by your browser. You must enable cookies to use WordPress.”
Please help me step by step how to tackle this problem so I can login again?
You also have multiple errors pointing to the /instagram-for-wordpress plugin. Use your ftp client or the file manager in your hosts control panel to rename or remove just the /instagram-for-wordpress folder and see if anything changes.