The caps
Team members are unlimited on the plans that include them, and posts per month
are effectively unlimited on every paid plan.
Channels
You have reached the maximum number of channelsFree a slot by disabling a channel you are not using: Calendar, channel
... menu, Disable Channel. Disabling keeps its history and you can
re-enable it later. See Manage a channel.
Or raise the cap by upgrading, see Plans.
Two things that do not count against the cap: reconnecting an existing
channel, and channels that are currently flagged as needing reconnection.

