Was patching the game after the release of 4.56 when my computer crashed. Any attempt to log in afterwards has resulted in a "FFXIV Launcher Error" window opening with the error message being "Unable to complete version check. [30410][30607][20457][404]", followed by me getting kicked back to the point where I have to type my login info again. I've had this issue before but I'm not sure if I had the exact same numbers since I didn't save them anywhere. It seemingly fixed itself after I got annoyed and just started copy and pasting my login info repeatedly but I don't seem to have the same luck this time.

I have flushed my DNS, tried a VPN, turned on all TLS and SSN options in my internet settings, changed the BootVersionCheckMode from 0 to 1, deleted the FFXIV_BOOT cfg file then started the launcher, ran the launcher in compatibility mode, ran the launcher as an administrator, all while frequently restarting my computer and modem. Just about everything I've been able to find by googling the error hasn't worked. I have not tried reinstalling the game yet since I have shameful download speeds and every post I've read seems to imply this can only make the issue worse instead of fixing it. I don't have any antivirus running, and I'm on Windows 7. The game was fully up to date and working as well as it usually does the night before.
Please advise.