Doesn't work on Pop!_OS 21.04, X11, Gnome 3.38.5

It crashes as soon as it finished its countdown!

Peek: 1.5.1 GTK: 3.24.23 GLib: 2.66.0 Desktop: pop:GNOME Display server: X FFmpeg version:

ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 10.2.0 (GCC)
configuration: --prefix=/app --disable-debug --disable-static --enable-gpl --enable-libvpx --enable-libx264 --enable-shared --enable-libxcb --enable-libxcb-xfixes --disable-libxcb-shape --disable-ffplay --disable-ffprobe --disable-doc --disable-everything --enable-bsf=vp9_superframe --enable-decoder=libvpx_vp9 --enable-decoder=png --enable-decoder=rawvideo --enable-encoder=apng --enable-encoder=ffvhuff --enable-encoder=gif --enable-encoder=libvpx_vp9 --enable-encoder=libx264 --enable-encoder=png --enable-demuxer=image2 --enable-demuxer=matroska --enable-muxer=apng --enable-muxer=gif --enable-muxer=image2 --enable-muxer=mp4 --enable-muxer=webm --enable-filter=crop --enable-filter=fps --enable-filter=palettegen --enable-filter=paletteuse --enable-filter=scale --enable-protocol=file --enable-indev=xcbgrab
libavutil      56. 51.100 / 56. 51.100
libavcodec     58. 91.100 / 58. 91.100
libavformat    58. 45.100 / 58. 45.100
libavdevice    58. 10.100 / 58. 10.100
libavfilter     7. 85.100 /  7. 85.100
libswscale      5.  7.100 /  5.  7.100
libswresample   3.  7.100 /  3.  7.100
libpostproc    55.  7.100 / 55.  7.100

Output format: gif gifski enabled: false

Error details:

Command "ffmpeg -f x11grab -show_region 0 -framerate 10 -video_size 1188x810 -i :99.0+258,282 -filter:v scale=iw/1:-1 -codec:v libvpx-vp9 -lossless 1 -r 10 -y /home/pavan/.var/app/com.uploadedlobster.peek/cache/peek/peekIO4SA1.webm" failed with status 256 (received signal 0).

Output:
ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers  built with gcc 10.2.0 (GCC)  configuration: --prefix=/app --disable-debug --disable-static --enable-gpl --enable-libvpx --enable-libx264 --enable-shared --enable-libxcb --enable-libxcb-xfixes --disable-libxcb-shape --disable-ffplay --disable-ffprobe --disable-doc --disable-everything --enable-bsf=vp9_superframe --enable-decoder=libvpx_vp9 --enable-decoder=png --enable-decoder=rawvideo --enable-encoder=apng --enable-encoder=ffvhuff --enable-encoder=gif --enable-encoder=libvpx_vp9 --enable-encoder=libx264 --enable-encoder=png --enable-demuxer=image2 --enable-demuxer=matroska --enable-muxer=apng --enable-muxer=gif --enable-muxer=image2 --enable-muxer=mp4 --enable-muxer=webm --enable-filter=crop --enable-filter=fps --enable-filter=palettegen --enable-filter=paletteuse --enable-filter=scale --enable-protocol=file --enable-indev=xcbgrab  libavutil      56. 51.100 / 56. 51.100  libavcodec     58. 91.100 / 58. 91.100  libavformat    58. 45.100 / 58. 45.100  libavdevice    58. 10.100 / 58. 10.100  libavfilter     7. 85.100 /  7. 85.100  libswscale      5.  7.100 /  5.  7.100  libswresample   3.  7.100 /  3.  7.100  libpostproc    55.  7.100 / 55.  7.100[x11grab @ 0x55882505f980] Stream #0: not enough frames to estimate rate; consider increasing probesizeInput #0, x11grab, from ':99.0+258,282':  Duration: N/A, start: 1633380061.625447, bitrate: 307929 kb/s    Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1188x810, 307929 kb/s, 10 fps, 1000k tbr, 1000k tbn, 1000k tbcStream mapping:  Stream #0:0 -> #0:0 (rawvideo (native) -> vp9 (libvpx-vp9))Press [q] to stop, [?] for help[libvpx-vp9 @ 0x55882506b640] v1.10.0[libvpx-vp9 @ 0x55882506b640] Failed to initialize encoder: ABI version mismatchError initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or heightConversion failed!

phw / peek

Doesn't work on Pop!_OS 21.04, X11, Gnome 3.38.5 #895