Liquid Exception: no implicit conversion of Symbol into Integer in /_layouts/default.html

[jeffblake]

#575 from January is still open, but locked for some reason. I haven't been able to deploy a new website update since then due to this bug. I'm sorry for opening another issue about it, but I don't know what else to do.

[sashee]

In my case the problem appeared when I tried to update bootstrap from 4.1.3 to the latest version.

My investigation:
The problematic code runs only if the crass gem is installed. bootstrap from version 4.2.1 transitively depends on crass: bootstrap => sassc-rails => railties => actionpack => rails-html-sanitizer => loofah => crass.

Pinning bootstrap to 4.1.3 solved my problem, temporarily.

[dramalho]

Just hit this as well, looking at the plugin/alternates.rb here the code is expecting o to be an object/hash but it's really CSS string - with @alternate bits in it and the whole thing blows up there