Conflict with Membermouse

Hi there,
Hope you guys can help me with this issue, I've been having a conflict problem, CoursePess with Membermouse.

PROBLEM: Every time an expired member try to log in they are supposed to be redirected to a core page from membermouse, instead users are getting an AJAX ERROR as you can see below.

I've talked to Membermouse and they came to the conclusion that is a conflict, CoursePress with Membermouse, when they activate the Safe Mode letting just Membermouse running all works good, when they activate CoursePress problem appears.

Could you guys help me out with this matter? I have the support access activated so you can check.

[AJAX ERROR] Incorrect response data :<!DOCTYPE html>

<html lang="en-US">

    <head>

        <meta charset="UTF-8">

        <meta name="viewport" content="width=device-width, initial-scale=1">

        <title>Custom Login | Native Portuguese Courses</title>

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/* <![CDATA[ */
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