first error message:
1x [ADDON_ACTION_BLOCKED] AddOn 'BigDebuffs' tried to call the protected function 'CompactRaidFrame1:ClearAllPoints()'.
[string "@!BugGrabber\BugGrabber.lua"]:519: in function <!BugGrabber\BugGrabber.lua:519>
[string "=[C]"]: in function ClearAllPoints' [string "@FrameXML\FlowContainer.lua"]:157: in function FlowContainer_DoLayout'
[string "@FrameXML\FlowContainer.lua"]:17: in function FlowContainer_ResumeUpdates' [string "@Blizzard_CompactRaidFrames\Blizzard_CompactRaidFrameContainer.lua"]:185: in function CompactRaidFrameContainer_LayoutFrames'
[string "@Blizzard_CompactRaidFrames\Blizzard_CompactRaidFrameContainer.lua"]:130: in function CompactRaidFrameContainer_TryUpdate' [string "@Blizzard_CompactRaidFrames\Blizzard_CompactRaidFrameContainer.lua"]:57: in function CompactRaidFrameContainer_OnEvent'
[string ":OnEvent"]:1: in function <[string ":OnEvent"]:1>

another error message:
1x [ADDON_ACTION_BLOCKED] AddOn 'BigDebuffs' tried to call the protected function 'CompactRaidFrame25:Show()'.
[string "@!BugGrabber\BugGrabber.lua"]:519: in function <!BugGrabber\BugGrabber.lua:519>
[string "=[C]"]: in function Show' [string "@FrameXML\CompactUnitFrame.lua"]:378: in function CompactUnitFrame_UpdateVisible'
[string "@FrameXML\CompactUnitFrame.lua"]:309: in function <FrameXML\CompactUnitFrame.lua:307>
[string "=[C]"]: in function `CompactUnitFrame_UpdateAll'
[string "@FrameXML\CompactUnitFrame.lua"]:193: in function <FrameXML\CompactUnitFrame.lua:193>

I get this error as well. For me it first starts out as an error that occurs once and then starts repeating more and more quickly, eventually hundreds of times per second at the end of a raid night.