Tygon Lord always puts out a error when you try to select that fight, doesn't crash your just incapable of fighting him. Only other feedback I can give would be to have the named bounties available at the relay be rotated around every so often so if your three options aren't something you can handle you can come back later and possibly snag something easier.
For the first, maybe you have not the last version of SWP, or if you have, well, i need to found the bug on a another space.
For the second, this is a on my to-do list ^^. (The availability of bounty depends of the level of the player, so this is not problematic, before.)
After, if you see a bounty who give too credits for the difficulty, or too less, do not hesitate ^^. Thank you.