#  Menção ao grupo impede a edição do tópico

**URL:** <https://meta.discourse.org/t/group-mention-prevents-editing-topic/71303>\
**Category:** Product Support\
**Created:** [Outubro 3, 2017, 10:17am UTC](https://meta.discourse.org/t/group-mention-prevents-editing-topic/71303 "2017-10-03T10:17:57Z")\
**Posts on this page:** 1\
**Showing post:** 1

<div class="post-metadata">

**Author:** ![hellekin](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/hellekin/32/51636_2.png) [@hellekin](https://meta.discourse.org/u/hellekin)\
**Post date:** [Outubro 3, 2017, 10:18am UTC](https://meta.discourse.org/t/group-mention-prevents-editing-topic/71303/1 "2017-10-03T10:18:01Z")

</div>

## Situation

After editing a topic’s description post containing a group mention, the server returns 500, preventing the edition.

## Diagnostic

Log says “TypeError: Discourse.Markdown is undefined Url: [https://ps.zoethical.com/assets/plugin-third-party-4d3728cb346366b10ae699230b046fac450fb2e79749c551e62df3d5756b4456.js](https://ps.zoethical.com/assets/plugin-third-party-4d3728cb346366b10ae699230b046fac450fb2e79749c551e62df3d5756b4456.js) Line: 9 Column: 12674 Window Location”:

```plaintext
@https://ps.zoethical.com/assets/plugin-third-party-4d3728cb346366b10ae699230b046fac450fb2e79749c551e62df3d5756b4456.js:9:12674
@https://ps.zoethical.com/assets/plugin-third-party-4d3728cb346366b10ae699230b046fac450fb2e79749c551e62df3d5756b4456.js:9:12663

```

It seems that one of the plugins is interfering with group mentions. But how to identify that plugin?

I had the occurrence already before upgrading to `1.9.0.beta11` but thought it was me using groups badly: I tried to send a group message, but failed with a similar error.

### List of plugins

```plaintext
          - git clone https://github.com/discourse/docker_manager.git
          - git clone https://github.com/discourse/discourse-spoiler-alert.git
          - git clone https://github.com/discourse/discourse-voting.git
          - git clone https://github.com/discourse/discourse-solved.git
          - git clone https://github.com/discourse/discourse-assign.git
          - git clone https://github.com/angusmcleod/discourse-locations.git
          - git clone https://github.com/angusmcleod/discourse-events.git
          - git clone https://github.com/lidel/discourse-openstreetmap.git

```

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