When adding a bar for a few particular addons, the bar will disappear upon reload/relog. I don't know what commonalty these addons have, but these are the addons I have found that demonstrate this issue with Candy (I'm sure there are others out there):

ArkInventory (https://www.wowace.com/projects/ark-inventory)
Buffet (https://www.wowace.com/projects/buffet)
Rematch (https://wow.curseforge.com/projects/rematch)
ShuckIt (https://mods.curse.com/addons/wow/shunkit)

These four work with other LDB display addons and only disappear in Candy. Thank you for your time and attention to detail.

Did it start happening after the recent update? It changed some of the internal frame naming that may be causing the error.

That I cannot say. I just recently tried your addon. Is it safe to install the older version over this one or will it muck up the saved variables?

Just installed v2.0.5 over the current version and had the same issue.

Fixed the bug in update version 2.0.7.

Error was related to addons that delay the creation of data broker module and my addon wasn't properly subscribed to the creation event.