502 error and can't update preferred environment in 2.4.5

Keep receiving 502 error on my site. Been happening for a few months now without resolution. Can’t update preferred environment - gets to about halfway then crashes. Have tried switching to a custom environment but doesn’t work. This is what I can see from the log files at the moment re: preferred environment at the moment.

error: [main/downloader/DownloaderQueue] Error: (HTTP code 500) server error - {“message”:“Error processing tar file(exit status 1): write /usr/bin/x86_64-linux-gnu-gcov-dump-6: read-only file system”}

at /Applications/Local by Flywheel.app/Contents/Resources/app.asar/node_modules/docker-modem/lib/modem.js:239:17
at IncomingMessage.<anonymous> (/Applications/Local by Flywheel.app/Contents/Resources/app.asar/node_modules/docker-modem/lib/modem.js:266:9)
at emitNone (events.js:111:20)
at IncomingMessage.emit (events.js:208:7)
at endReadableNT (_stream_readable.js:1056:12)
at _combinedTickCallback (internal/process/next_tick.js:138:11)
at process._tickDomainCallback (internal/process/next_tick.js:218:9)

Any ideas? Help would be appreciated. Will need to switch to a different local developer if can’t resolve.