I've used an Android electrum wallet forever and accidentally updated it (version 4.5.1). Now I have no idea how to send funds. It partially signs and requests a co-signer and I cannot get past this point. I don't see any documentation addressing this so I'm sure it's something I'm overlooking but I'm wasting a ton of time and hoping someone can just point me in the right direction.
It was not an accident the update, it occurs automatically and happened on January 19, 2024, in effect you have the last version 4.5.1, So, check that you have version 6 of android or higher.
If it is not the above, Uninstall it and directly download the new version (play store) and check the APP permits. Verify that it in effect has the correct version and that it corresponds. Take the corresponding forecasts since it may be putting your btc at risk.