The answer to this notice is explained in the “Learn more” link included in the message — it leads to the official Meta topic on handling the component-template-resolving deprecation.
In short, this isn’t an update problem but a deprecation warning. It means one of your themes or plugins still uses old component-template code. The article explains how to identify which one.
You can also use safe mode to narrow it down:
- Go to
/safe-mode. - Disable all theme components, then reload the site.
- If the notice disappears, one of those components is the cause.
- If it stays, re-enable themes and instead disable all plugins to test those.
- Re-enable items one by one until the notice returns — that’s your culprit.
Once you know which plugin or theme causes it, you can update or temporarily disable it until the author releases a fix.