Describe the problem

This is not in any way a BCM problem it's other addons polluting the global environment with generically named variables.
In this particular case ZoneInfo Classic is putting Settings in the global namespace as the name of its per character settings. 👎🏻

What steps will reproduce the problem?

1. Login with both BCM and ZoneInfoClassic on Wrath Classic
2. /bcm

Consider attaching a screenshot below to help describe your issue (Attach directly, do not link to other websites)

What version of the addon are you using? (Stating 'latest' is not useful)

Do you have an error log of what happened?

Any additional information? (example: WoW language if not English)

This is not a BCM problem but it could be mitigated by checking for presence of the API used in addition to the Object name.
BasicConfig.lua:101

if Settings and Settings.OpenToCategory then -- XXX Dragonflight

might guard against such silliness as a global Settings variable from other addons.