login problem

Yes as I add this plugin to all of my client sites as it is one of my fav plugin, but I’ve faced this issue in some of my client site and even in my own site too (in incognito mode) now I’m thinking about deactivating this plugin. It seems unstable sometimes, but I’m still unable to figure out why it perform weirdly sometimes.

Is it showing error message before submit login form? Can you assist me to reproduce this?

no it shows up after validating the captcha. Don’t know why this is happening so its hard to tell how to reproduce it.

This plugin use wp_remote_post() function with all default values. I have to investigate if it somehow return any error (may be for timeout or any other reason), You can increase timeout and try.

Let me know.

Did you try changin allow_url_fopen=on param in your php.ini?