that is strange!
but this seems to need further investigation from the TranslatePress Support Team, my suggestion would be to create a ticket at:
https://translatepress.com/support/ask-a-presale-question/
they will help you there.
Kind regards,
Hello @frogerme
Did you had the change to fix this?
It is still visible in logs.
PHP Notice: Undefined index: HTTP_USER_AGENT in /home/_______/web/_______/public_html/wp-content/plugins/wp-remote-users-sync/inc/api/class-wprus-api-login.php on line 49
many thanks for the plugin nonetheless!