Hello there,
-First suggestion would be to connect to the original computer where it was encrypted, then turn off encryption .
-If you wish you open it in another PC then when you connect it you must get a pop up , Click or tap on this "Unlock drive" notification to see the dialogue for entering the BitLocker password.
-You can also use the Control Panel to unlock a BitLocker drive. Open Control Panel, and go to "System and Security," followed by "BitLockerDrive Encryption." Under "Removable data drives - BitLocker To Go" click or tap on the encrypted drive that you want, and then press on the Unlock drive link next to it.
- If your PC is not detecting then check if it is online in the diskmgmt.msc .
Hope this Answers all your queries , if not please do repost back .
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Happy helping
Mukesh S