The error file is error311kzv7.txt and clearly relates to permissions - but for what I am not too sure!
bn.BUILD_KEY: Dropbox
bn.VERSION: 121.4.4267
bn.constants.WINDOWS_SHELL_EXT_VERSION: 47
bn.is_frozen: True
machine_id: c4af4f92-b71c-50f0-9c65-7e4e590ebe5d
pid: 3906
ppid: 1
uid: 503
user_info: pwd.struct_passwd(pw_name='andymurdock', pw_passwd='********', pw_uid=503, pw_gid=20, pw_gecos='Andy Murdock', pw_dir='/Users/andymurdock', pw_shell='/bin/zsh')
effective_user_info: pwd.struct_passwd(pw_name='andymurdock', pw_passwd='********', pw_uid=503, pw_gid=20, pw_gecos='Andy Murdock', pw_dir='/Users/andymurdock', pw_shell='/bin/zsh')
euid: 503
gid: 20
egid: 20
group_info: grp.struct_group(gr_name='staff', gr_passwd='*', gr_gid=20, gr_mem=['root', 'avits', 'andymurdock', '_xcsbuildagent', '_serialnumberd', '_xcscredserver'])
effective_group_info: grp.struct_group(gr_name='staff', gr_passwd='*', gr_gid=20, gr_mem=['root', 'avits', 'andymurdock', '_xcsbuildagent', '_serialnumberd', '_xcscredserver'])
DYLD_LIBRARY_PATH: None
cwd: '/'
real_path='/'
mode=0o40755 uid=0 gid=0
parent mode=0o40755 uid=0 gid=0
HOME: '/Users/andymurdock'
appdata: '/Users/andymurdock/.dropbox/instance1'
real_path='/Users/andymurdock/.dropbox/instance1'
mode=0o40700 uid=503 gid=20
parent mode=0o40700 uid=503 gid=20
dropbox_path: '/Users/andymurdock/Dropbox'
real_path='/Users/andymurdock/Dropbox'
mode=0o40700 uid=503 gid=20
parent mode=0o40755 uid=503 gid=20
sys_executable: '/Applications/Dropbox.app/Contents/MacOS/Dropbox'
real_path='/Applications/Dropbox.app/Contents/MacOS/Dropbox'
mode=0o100755 uid=504 gid=20
parent mode=0o40755 uid=504 gid=20
trace.__file__: '/Applications/Dropbox.app/Contents/Resources/python-packages.zip/dropbox/client/ui/common/boot_error.pyc'
real_path='/Applications/Dropbox.app/Contents/Resources/python-packages.zip/dropbox/client/ui/common/boot_error.pyc'
not found
parent not found
tempdir: '/var/folders/4x/dp3rz5m958jfvtwh5tyc7yjm0000gq/T'
real_path='/private/var/folders/4x/dp3rz5m958jfvtwh5tyc7yjm0000gq/T'
mode=0o40700 uid=503 gid=20
parent mode=0o40755 uid=503 gid=20
Traceback (most recent call last):
File "dropbox/client/main.pyc", line 817, in wrapper
File "dropbox/client/main.pyc", line 6338, in finish_dropbox_boot
File "dropbox/client/main.pyc", line 5867, in _init_components_for_account
File "dropbox/client/main.pyc", line 5784, in create_sync_engine
File "dropbox/sync_engine_boundary/factory.pyc", line 225, in make_sync_engine
File "dropbox/sync_engine/nucleus/classic_client/sync_engine.pyc", line 279, in __init__
File "dropbox/sync_engine/nucleus/classic_client/modern_client/modern_client.pyc", line 205, in __init__
File "dropbox/sync_engine/nucleus/classic_client/modern_client/base.pyc", line 148, in __init__
File "dropbox/sync_engine/nucleus/classic_client/thin_adapter/in_proc.pyc", line 231, in __init__
File "dropbox/sync_engine/nucleus/classic_client/thin_adapter/in_proc.pyc", line 619, in _init_new_engine_locked
File "dropbox/sync_engine/nucleus/thin_client/client.pyc", line 201, in __init__
File "extensions/nucleus/nucleus_python.pyx", line 79, in nucleus_python.NucleusSyncEngine.__cinit__
nucleus_python.SyncEngineError: "Initializing engine |>> Initializing filesystem |>> Attempting to register icons |>> Opening dst |>> open syscall |>> Permission denied"