Unable to click the "Save" button after entering configuration details for a build.

[default-account-name]

When adding a build notification, I am unable to save the notification after entering the branch and channel info only.
No action occurs when clicking "Save", just the click animation. There are no error messages when the branch and channels are populated. The cancel button is always functional.

When clicking "Save" with no details, an error pops up stating "One or more required params are missing".

Additionally, the "Add" button on the Slack tab works at least the first time, but requires a page refresh after that.

I saw this on v1.1.7(i think), as well as the latest version. I don't experience this behavior anywhere else in teamcity. I've tried this on Safari, Firefox, and Chrome, and have the same results.

[default-account-name]

All of these notifications started showing up about 2 hours after submitting them originally.

[alexkvak]

Could you tell what plugin and TeamCity version do you use?

And also do you use modern UI or legacy?