regex with lineinfile module giving error

I have version 1.8.2 of ansible, but it’s giving me this error when I try to use regex with lineinfile:

**msg: unsupported parameter for module: regex**

Here's what I'm trying to run:

- name: Set ASSET_VERSION to commit hash
  sudo: true
  sudo_user: "{{ app_name }}"
  lineinfile: 
    dest: "{{ env_path }}/{{ app_name }}-env.{{ stage }}"
    line: "ASSET_VERSION={{ commit_hash.stdout }}"
    regex: "^ASSET_VERSION="
    state: present
  tags:
    - design


It will run without the regex, but not with the regex. Was regex taken out of lineinfile?

regexp not regex is the parameter.

Ugh!. Thanks