<link rel=preload> has an unsupported `type` value
When I open Sidecar’s chat I got many warnings in Chrome DevTool console:
<link rel=preload> has an unsupported `type` value ~embed:23
<link rel=preload> has an unsupported `type` value ~embed:24
<link rel=preload> has an unsupported `type` value ~embed:25
<link rel=preload> has an unsupported `type` value ~embed:26
<link rel=preload> has an unsupported `type` value ~embed:27
<link rel=preload> has an unsupported `type` value ~embed:28
<link rel=preload> has an unsupported `type` value ~embed:29
I found a source of the problem:
<link rel="preload" href="//cdn02.gitter.im/_s/4a6e94760/fonts/sourcesans/SourceSansPro-Regular.otf" as="font" type="font/">
<link rel="preload" href="//cdn01.gitter.im/_s/4a6e94760/fonts/sourcesans/SourceSansPro-It.otf" as="font" type="font/">
<link rel="preload" href="//cdn03.gitter.im/_s/4a6e94760/fonts/sourcesans/SourceSansPro-Bold.otf" as="font" type="font/">
<link rel="preload" href="//cdn02.gitter.im/_s/4a6e94760/fonts/sourcesans/SourceSansPro-Semibold.otf" as="font" type="font/">
<link rel="preload" href="//cdn01.gitter.im/_s/4a6e94760/fonts/sourcesans/SourceSansPro-BoldIt.otf" as="font" type="font/">
<link rel="preload" href="//cdn02.gitter.im/_s/4a6e94760/fonts/sourcesans/SourceSansPro-Light.otf" as="font" type="font/">
<link rel="preload" href="//cdn02.gitter.im/_s/4a6e94760/fonts/sourcesans/SourceSansPro-ExtraLight.otf" as="font" type="font/">
The type value is font/
without a correct second part of the MIME type.