It may happen that your browser password manager may show the autofill recommendation which will be displayed upon the LogMeOnce autofill popup. This may cause difficulty auto-filling forms using LogMeOnce.
This is how it looks, the browser password manager popup will be overlaying the LogMeOnce popup.
In order to rectify this issue, first and foremost, you need to check that the autofill settings have been turned off for your browser from your browser settings as well as your LogMeOnce settings. Please follow this link below to view a detailed article on turning off auto-fill and built-in password manager in your browser.
Once you have done that, your browser settings will look like this:
Once this has been done, check if the issue still persists. If you are still getting the browser password manager popup during sign-in, you would need to delete the respective password from the browser password manager. Passwords saved in your browser password manager may pop up even when the setting is disabled.
Go to your browser password manager where your passwords are stored or simply follow this link for Chrome: chrome://settings/passwords
Remove the password of the respective website.
Now, you will be all set and the browser password manager popup will not show up and you will be able to see the LogMeOnce autofill popup.