Run the following commands to resolve this error;

rm -rf var/cache/prod php

bin/console oro:assets:install --env=prod

You should get this results when it's successful

The last command would reinstall the assets. you need to see the following to know this has worked.

If this doesn't work. Run them again and again until it works. if this fails, run these in succession;

rm -rf var/cache/prod

php bin/console oro:assets:install --env=prod

rm -rf var/cache/prod

bin/console oro:platform:update --force --env=prod