# Plugin not work and show
**URL:** https://meta.discourse.org/t/plugin-not-work-and-show/66065
**Category:** Support
**Created:** [July 12, 2017, 4:34pm UTC](https://meta.discourse.org/t/plugin-not-work-and-show/66065 "2017-07-12T16:34:45Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@Bank\_Live](https://meta.discourse.org/u/Bank_Live)
#### Post date: [July 12, 2017, 4:34pm UTC](https://meta.discourse.org/t/plugin-not-work-and-show/66065/1 "2017-07-12T16:34:45Z")
before add new plugin every plugin it work normal But after add discourse-calendar-plugin get plugin MathJax not work and whos-online not show.
I try
```
cd /var/discourse
git pull
./launcher rebuild app
```
many times not work. I think it caused old cache of MathJax and whos-online.
How to i fix
---
### Author:  [@cpradio](https://meta.discourse.org/u/cpradio)
#### Post date: [July 12, 2017, 5:01pm UTC](https://meta.discourse.org/t/plugin-not-work-and-show/66065/2 "2017-07-12T17:01:26Z")
We need to know what error is being thrown, so after visiting your site, press F12, which should open the Developer Console and copy the error.
Also, it isn’t easy to infer if you took out the discourse-calendar-plugin again and did a rebuild or not.
---
### Author:  [@Bank\_Live](https://meta.discourse.org/u/Bank_Live)
#### Post date: [July 12, 2017, 5:32pm UTC](https://meta.discourse.org/t/plugin-not-work-and-show/66065/3 "2017-07-12T17:32:45Z")
i see 1 error “plugin-third-party…” I can delete it. Because it was not on the list I installed. or not
> Also, it isn’t easy to infer if you took out the discourse-calendar-plugin again and did a rebuild or not.
I try not work and try Install MathJax and whos-online only it not work.😓
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### Author:  [@cpradio](https://meta.discourse.org/u/cpradio)
#### Post date: [July 12, 2017, 5:37pm UTC](https://meta.discourse.org/t/plugin-not-work-and-show/66065/4 "2017-07-12T17:37:06Z")
Fairly certain mathjax is the issue, disable that plugin and see if your install works, then install the new mathjax plugin
> [@Discourse Math](https://meta.discourse.org/t/discourse-math-plugin/65770):
>
> discourse2Summary Discourse Math uses [MathJax](https://www.mathjax.org/) (default) or [KaTeX](https://katex.org/) to render maths in your Discourse forum.open_bookInstall Guide This plugin is bundled with Discourse core. There is no need to install the plugin separately. Enabling Math The Math plugin can be enabled from its settings, accessed from your admin/plugins page: [Math settings] Features Once enabled, you can render inline math by wrapping with a single $ like so: $E=mc^2$. You can render blocks of math…
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### Author:  [@Bank\_Live](https://meta.discourse.org/u/Bank_Live)
#### Post date: [July 14, 2017, 4:56am UTC](https://meta.discourse.org/t/plugin-not-work-and-show/66065/5 "2017-07-14T04:56:41Z")
Remove plugin MathJax result is who’s online can show.But plugin MathJax or Math not work and `F12` i see 1 error “plugin-third-party…”
---
### Author:  [@cpradio](https://meta.discourse.org/u/cpradio)
#### Post date: [July 14, 2017, 10:26am UTC](https://meta.discourse.org/t/plugin-not-work-and-show/66065/6 "2017-07-14T10:26:34Z")
We would need to know the entire error to help. When you installed the Discourse Math Plugin, did you enable the markdown-it site setting?
---
### Author:  [@Bank\_Live](https://meta.discourse.org/u/Bank_Live)
#### Post date: [July 14, 2017, 10:41am UTC](https://meta.discourse.org/t/plugin-not-work-and-show/66065/7 "2017-07-14T10:41:46Z")
```
- git clone https://github.com/discourse/docker_manager.git
- git clone https://github.com/kasperpeulen/discourse-mathjax.git
- git clone https://github.com/davidtaylorhq/discourse-media-overlay.git
- git clone https://github.com/discourse/discourse-spoiler-alert.git
- git clone https://github.com/sekhat/discourse-yuml.git
- git clone https://github.com/davidtaylorhq/discourse-whos-online.git
- git clone https://github.com/discourse/discourse-solved.git
## Any custom commands To run after building
run:
- exec: echo "Beginning of custom commands"
## If you want To Set the 'From' email address for your first registration, uncomment and change:
## After getting the first signup email, re-comment the line. It only needs To run once.
#- exec: rails r "SiteSetting.notification_email='info@unconfigured.discourse.org'"
- exec: echo "End of custom commands"
```
[https://eleceasy.com/assets/plugin-third-party-ce553a8c32137d73b757548b95ff30a0aff44b597c7463c6f06987011d44a7f6.js](https://eleceasy.com/assets/plugin-third-party-ce553a8c32137d73b757548b95ff30a0aff44b597c7463c6f06987011d44a7f6.js)
   
Yes, I enable
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### Author:  [@cpradio](https://meta.discourse.org/u/cpradio)
#### Post date: [July 14, 2017, 11:21am UTC](https://meta.discourse.org/t/plugin-not-work-and-show/66065/8 "2017-07-14T11:21:23Z")
You still have the wrong mathjax plugin installed.
Change `git clone https://github.com/kasperpeulen/discourse-mathjax.git` to
`git clone https://github.com/discourse/discourse-math.git`
---
### Author:  [@Bank\_Live](https://meta.discourse.org/u/Bank_Live)
#### Post date: [July 15, 2017, 4:35pm UTC](https://meta.discourse.org/t/plugin-not-work-and-show/66065/9 "2017-07-15T16:35:30Z")
Yes, It work. thank you.
---
### Author:  [@JammyDodger](https://meta.discourse.org/u/JammyDodger)
#### Post date: [June 8, 2024, 12:44pm UTC](https://meta.discourse.org/t/plugin-not-work-and-show/66065/10 "2024-06-08T12:44:28Z")
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