the posixPermissions of the file to be imported is already 0o777
the logs are:
2019-07-08 12:36:30.503789+0800 brownie[1192:69381] [Common] _BSMachError: port 7b77; (os/kern) invalid capability (0x14) "Unable to insert COPY_SEND"
[DocumentBrowserViewController], 2019-07-08 04:36:30 +0000, 217, Failed to import document at file:///Users/zhangqi/Library/Developer/CoreSimulator/Devices/4415C024-0DD9-497C-A6B7-EECCDD7EAD5A/data/Containers/Data/Application/65A7E808-05F5-4DA0-8186-8370F645C579/tmp/Central%20Topic.xmind
