User unable to install add-on, getting warning and errors. Please help diagnose

Hi! I’d really appreciate it if someone can help me brainstorm this issue. Someone is trying to install an add-on I have created, and they are getting this cryptic warning and error messages in the docker build log:

21-03-31 19:21:13 ERROR (SyncWorker_0) [supervisor.docker.addon]
Can’t build 74930c0d/armv7-addon-rtl433:0.1.2: The command ‘/bin/ash -o pipefail -c apk add --no-cache --virtual build-deps alpine-sdk cmake git libusb-dev && mkdir /tmp/src && cd /tmp/src && git clone git://git.osmocom.org/rtl-sdr.git && mkdir /tmp/src/rtl-sdr/build && cd /tmp/src/rtl-sdr/build && cmake …/ -DINSTALL_UDEV_RULES=ON -DDETACH_KERNEL_DRIVER=ON -DCMAKE_INSTALL_PREFIX:PATH=/usr/local && make && make install && chmod +s /usr/local/bin/rtl_* && cd /tmp/src/ && git clone https://github.com/merbanan/rtl_433 && cd rtl_433/ && mkdir build && cd build && cmake …/ && make && make install && apk del build-deps && rm -r /tmp/src && apk add --no-cache libusb’
returned a non-zero code: 5
...skip...
—> [Warning] The requested image’s platform (linux/arm) does not match the detected host platform (linux/arm64/v8) and no specific platform was requested
...skip...
WARNING: Ignoring https://dl-cdn.alpinelinux.org/alpine/v3.13/main: temporary error (try again later)

WARNING: Ignoring https://dl-cdn.alpinelinux.org/alpine/v3.13/community: temporary error (try again later)

The full error log is posted elsewhere in this forum.

Do any of those message ring a bell? Any ideas? Anything I should be looking at?

Thanks in advance.