Kuro22 reported an issue with adding/editing tags on their Discourse site, running version 2.9.0.beta3. Despite being the admin, they are unable to save changes to tags, which disappear after refreshing the page. JammyDodger suggested it might be a configuration error and asked for a walkthrough of the issue. Kuro22 shared a screen recording of the issue and ruled out trust level restrictions. Benjamin_D suggested a plugin issue, but Kuro22 confirmed the problem persists in safe mode. The issue affects all tags, not just a specific one. JammyDodger was unable to replicate the issue and suggested checking the console for errors. The topic has been moved to the Support category for further assistance.
I find that it’s not possible to add/edit an existing topic’s tags. The modification was lost right after refreshing the page…
This is maybe a bug? or the software simply doesn’t allow modifying tags once a topic is posted?
Any help would be appreciated 
Running Discourse version: 2.9.0.beta3
You can edit a topic to add a tag. 
(I’ve just added one to this topic as an example 
)
Could you talk me through how you’re encountering this issue? Are there any trust level restrictions in place that could be blocking you from tagging on that site?
Oh I see the tag you added. There must be some configuration error on my site 
I recorded my screen, the scene was as below 
The tag I added just disappeared 
I’m the admin of this site, so I think maybe it’s not the problem of trust level 
Maybe a plugin issue? Could you try safe-mode ?
Unfortunately this problem persist in safe mode..
And is it across all tags, or just that specific one?
It’s across all tags.
I’ve been trying to replicate this, but no luck so far. I’ve slid it over to the Support category to see if anyone else can think of a way to help.
Are there any errors in the console when you set the tag/refresh the page?