I know it's been a while but I worked out the fix when it happend to me. It's because the save file was in "read-only" mode. Setting .bat file to start as admin solved the issue.

What mod did this end up being? I'm having the same issue and have quite a few mods.

I will show a mp4 of what happens below. First I enter my username with a wrong password to show what happens when I enter the wrong password compared to when I enter the right one. Then I enter my username along with my password and the page loads for a while and then gives up. The in-game mod mana...

This issue is happening to me a lot now.

reloading what? The webpage? It does it every time I refresh.