XF 2.1 Can't change permissions all of a sudden - Oops! We ran into some problems.

Cannabis Ape

Active member
Hmm Don't know why but when I try to save permissions I get that Oops popup. Oops! We ran into some problems. Please try again later. More error details may be in the browser console.

I haven't changed anything on the server I'm aware of. The console states;

PHP: <!DOCTYPE html>
<html lang="en">
  <meta charset="utf-8">
  <meta http-equiv="x-ua-compatible" content="ie=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <title>403 Forbidden</title>
  <link rel="stylesheet" href="/error_docs/styles.css">
<div class="page">
  <div class="main">
    <h1>Server Error</h1>
    <div class="error-code">403</div>
    <p class="lead">You do not have permission to access this document.</p>
    <p>That's what you can do</p>
    <div class="help-actions">
      <a href="javascript:location.reload();">Reload Page</a>
      <a href="javascript:history.back();">Back to Previous Page</a>
      <a href="/">Home Page</a>
Reloading doesn't work.