I can image that it must hurt with a bad internet connection running Daedalus. The probably best thing you can do is: try it again and reproduce the bug in Yoroi, then go settings -> support and send the log file to the support.
Similar thread with no solution here: Error while attempting to transfer funds from Daedalus to Yoroi
Error message can be found also found in icarus as “api.errors.getAddressesWithFundsError”: https://github.com/input-output-hk/project-icarus-chrome/blob/ecfcc560323d4c656db12f5641aa33642c40f4c1/app/i18n/locales/en-US.json it may be also related to a connection issue but I didn’t dig into it.