FCast not working on SONY Bravia TV

[NP-Gaming]

Hi, I recently switched from using Chromecast to FCast by GrayJay.

It works perfectly on two of my devices (NVIDIA SHIELD & Sony BRAVIA 4K GB), but I can’t get it to work on one: my Sony BRAVIA 4K UR1 (model KD-55AF9). I’ve tried reinstalling the app, updating the TV, and clearing the app data, but nothing has resolved the issue. Whenever I attempt to cast to the TV using GrayJay, I consistently get the following error:

MediaCodecVideoRender error, index=0, format=Format(1, null, null, video/x-vnd.on2.vp9, vp09.00.50.08, 100000, en, [3840,2160, -1.0, ColorInfo(BT709, Limited range, SDR SMPTE 170M, false, NA, NA)], [-1, -1]), format_supported=YES → Decoder failed: OMX.MTK.VIDEO.DECODER.VP9 → Unknown error

For additional context: I am casting from a Samsung Galaxy S20FE 5G and using the paid version of the GrayJay app (not installed from Google Play Store).