Why can't I edit issues?

[Noble Shore]

Getting net::ERR_HTTP2_PROTOCOL_ERROR when attempting to update any issue, any project in Jira Cloud.  I'm an org/site admin and this applies to Service Desk issues as well as regular Jira projects.

The UI simply says "The value could not be saved."

[Nic Brough -Adaptavist-]

Welcome to the Atlassian Community!

This is a network error, not an Atlassian one.  You will need to look at your network settings to see where it is failing - the problem is between two places - from your organisation blocking data or your browser being misconfigured.

[Derek Fields (RightStar)]

The error is coming from your browser and appears to be associated with the SSL certificate. Try clearing out your browser cache and restart.