Hey again @PurpleSabbath,
We've looked into this with the right team and it seems that you have over 900,000 saved songs and the app is trying to load those up, but since that is a very large amount, the devices are timing out. There's unfortunately no way for us to influence how the devices can handle such a large amount of data at this moment.
To bring this into perspective, if we assume an average file size of 3.5MB per track, having actual files of those tracks would require over 3.5 Terabytes of storage capacity on your local device. Even though only a fraction of this needs to be transferred every time a device tries to load up your library it will still be a very large data-size
If you'd like to you can reach out to our Customer support, but we cannot guarantee that a solution will be found and we do recommend to try and build a new collection, while keeping in mind that there're technical limitations on how a device can process data. They can also help you so your current email can be updated on your new account.