When I click on Insert Image icon
-new window opens
I select a 47.5 KB JPG file and click on upload file(s)
I get an orange/red circle with ! in it. Only option is to "clear List
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If I go to Additional Options and select Manage Attachments
I get this

Note in upper right, it appears I am over some limit but I find no way to delete these old files so I can't upload new files.
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What am I doing wrong?