I'm currently running VeraCrypt v1.25.9 and trying to open a TrueCrypt container created about 10 years ago. I'm certain that the password/key is correct since I saved that in a text file before uploading the container to Google Drive. It's 63 random characters (uppercase/lowercase/numbers) long. I've made sure VC is running in TrueCrypt mode, I've tried using the backup header option and I've redownloaded the file several times. I also have several thumbdrives from around the same period that were...