I’ve also been seeing this error after every 18-20 successful transactions… a temporary fix seems to be to create a new Electrum wallet and update the MPK, but a permanent solution would be great… can provide error_log details if required
ERROR: cannot generate bitcoin address for the order: ‘Failed to find/generate bitcoin address. Problem: Generated ’20’ addresses and none were found to be unused. Possibly old merchant’s wallet (with many used addresses) is used for new installation. If that is the case – ‘starting_index_for_new_btc_addresses’ needs to be proper set to high value’
and I seem to have fixed it by generating a new electrum wallet…
I dug through some code & I think I figured out that you are actually using the Blockchain ticker price https://blockchain.info/ticker and not the Mt.Gox API (as it can be quite slow)…
Should this be updated in the documentation? They may have been the same in the past, but they show very different prices these days.