Unhandled exception while unsubscribing a feed

Describe the problem you’re having:
I get the following warning while unsubscribing a feed:

TypeError: Cannot read property ‘style’ of null
at Function.hide (https://example.com/tt-rss/lib/prototype.js?1544814980:2157:13)
at Object.updateCurrentUnread (https://example.com/tt-rss/js/Headlines.js?1576440476:556:13)
at Object.onLoaded (https://example.com/tt-rss/js/Headlines.js?1576440476:661:16)
at https://example.com/tt-rss/js/Feeds.js?1576440476:367:17
at onComplete (https://example.com/tt-rss/js/common.js?1544814978:26:32)
at klass.respondToReadyState (https://example.com/tt-rss/lib/prototype.js?1544814980:1827:62)
at klass.onStateChange (https://example.com/tt-rss/lib/prototype.js?1544814980:1756:12)

If possible include steps to reproduce the problem:
Left pane, right mouse click on a feed, edit feed, unsubscribe

tt-rss version (including git commit id):
19.12-9f70bb0

Platform (i.e. Linux distro, PHP, PostgreSQL, etc) versions:
Shared hosting, php 7.2, Maria db

Please provide any additional information below:
The feed is unsubscribed anyway

https://git.tt-rss.org/fox/tt-rss/commit/f83836ade9f109f567c05360a4e23a69d7c73772

thanks for reporting

Works beautifully now. Thank you for fixing it :slight_smile: