Fixed a bunch of spots where exceptions are thrown

What have you done in this MR?

• @ryannathans's bidding

Are there any tricky things testers should keep an eye out for?

• No
• Yes, as follows:
• I have tested these changes thoroughly.
• This requires extra testing due to changes to architecture or other similarly risky changes.
• I used the Thanos Tool for any JSON edits where possible, and have attached screenshots of any changes.
• I acknowledge that this contribution will be released under the AGPL license.