[Glitch] Fix WebUI crash on sensitive preview card with no preview thumbnail

Port d308a863fbd373b94fa571103ad431782c29e074 to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/app/javascript/flavours/glitch/features/status/components/card.js b/app/javascript/flavours/glitch/features/status/components/card.js
index b4db62f4a..ab6398e1a 100644
--- a/app/javascript/flavours/glitch/features/status/components/card.js
+++ b/app/javascript/flavours/glitch/features/status/components/card.js
@@ -86,7 +86,7 @@ export default class Card extends React.PureComponent {
   componentDidMount () {
     window.addEventListener('resize', this.handleResize, { passive: true });
 
-    if (this.props.card && this.props.card.get('blurhash')) {
+    if (this.props.card && this.props.card.get('blurhash') && this.canvas) {
       this._decode();
     }
   }