'
```
It works in a category that is top level and a single word, but not in a category that is a sub-category and has a hypen in the name 😕
**These work:**
[https://forum.com/new-topic?category=admin&tags=tag1,tag2](https://forum.com/new-topic?category=admin&tags=tag1,tag2)
[https://forum.com/new-topic?category=moderators&tags=tag1,tag2](https://forum.com/new-topic?category=moderators&tags=tag1,tag2)
**These don’t work:** (they are sub-categories)
[https://forum.com/new-topic?category=frontend-chat&tags=tag1,tag2](https://forum.com/new-topic?category=frontend-chat&tags=tag1,tag2)
[https://forum.com/new-topic?category=frontend-news&tags=tag1,tag2](https://forum.com/new-topic?category=frontend-news&tags=tag1,tag2)
(Guess it might be worth trying to pass the category ID instead? Is that possible?)
**Edit** :
Looks like it doesn’t work for sub-categories. I created a new sub-category called ‘test’ - tried it, but it didn’t work. I then moved it out of the parent category and made it a top level category… and then it worked.
---
### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [22 במרץ, 2021, 7:26pm UTC](https://meta.discourse.org/t/complex-url-for-creating-new-topics-results-in-server-side-error/184067/4 "2021-03-22T19:26:43Z")
So the issue is that the URL works for subcategories and for tags, but not for both subcategories with multiple tags at the same time. Updated the title.
Error example: [https://meta.discourse.org/new-topic?title=topic%20title&body=topic%20body&category=support/wordpress&tags=wordpress,blog](https://meta.discourse.org/new-topic?title=topic%20title&body=topic%20body&category=support/wordpress&tags=wordpress,blog)
It works fine via Ember routing but fails server side (like if open in a new tab).
---
### Author:  [@AstonJ](https://meta.discourse.org/u/AstonJ)
#### Post date: [22 במרץ, 2021, 7:36pm UTC](https://meta.discourse.org/t/complex-url-for-creating-new-topics-results-in-server-side-error/184067/5 "2021-03-22T19:36:44Z")
The same thing is happening here with that link in your post:
```plaintext
Oops
The software powering this discussion forum encountered an unexpected problem. We apologize for the inconvenience.
Detailed information about the error was logged, and an automatic notification generated. We'll take a look at it.
No further action is necessary. However, if the error condition persists, you can provide additional detail, including steps to reproduce the error, by posting a discussion topic in the site's feedback category.
```
…but on my forum it seems to be when the category is a sub-category vs when it is a top level category. I was just using the category name-btw, not including the parent category name in the URL like you have and it was all working fine previously.
_(Not sure I would call it a ‘complex’ URL too mind - its just a new-topic URL with params?)_
---
### Author:  [@techAPJ](https://meta.discourse.org/u/techAPJ)
#### Post date: [24 במרץ, 2021, 11:29am UTC](https://meta.discourse.org/t/complex-url-for-creating-new-topics-results-in-server-side-error/184067/7 "2021-03-24T11:29:25Z")
Looks like it regressed in [this commit](https://github.com/discourse/discourse/commit/cf1a80dea6f5ed964d8f371e65daa06ba500db91). PR with fix here:
[https://github.com/discourse/discourse/pull/12503](https://github.com/discourse/discourse/pull/12503)
Thanks for reporting this issue @AstonJ 👍
EDIT: PR is merged.
[https://meta.discourse.org/new-topic?title=topic%20title&body=topic%20body&category=support/wordpress&tags=wordpress,blog](https://meta.discourse.org/new-topic?title=topic%20title&body=topic%20body&category=support/wordpress&tags=wordpress,blog)
^^ above example now works on server side.
---
### Author:  [@techAPJ](https://meta.discourse.org/u/techAPJ)
#### Post date: [24 במרץ, 2021, 3:12pm UTC](https://meta.discourse.org/t/complex-url-for-creating-new-topics-results-in-server-side-error/184067/8 "2021-03-24T15:12:55Z")