When selecting "Check for Updates" from the BitBar dropdown menu, I get an update error:

I am on the latest version of BitBar (1.9.2), running on MacOS 10.13.3 (17D102), and currently only use one plugin:
Weather by Daniel Seripap
I have the same error
It's probably due to this: https://githubengineering.com/crypto-deprecation-notice/ which happened on Feb 22nd.
But there's no new release/version anyway, and it seems unlikely there will be one soon.
This is still an issue.
There are two problems. First, Sparkle is too old and returns error "Insecure update error!" when we try to update.
Second, URL used to update don't works -and is hardcoded: https://github.com/matryer/bitbar/blob/master/App/BitBar/AppDelegate.m#L36-L39 (look at this url: https://bitbarapp.com/feeds/bitbar )
I created a release with a "new" version (v1.9.3) resolving these problems, because I see that project is abandoned 馃槥
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This is still an issue.