Help! "Couldn't start Dropbox" error (Mac & Big Sur)

I gave up and reinstalled my Dropbox files from the cloud. So that was

mv Dropbox XDropbox

and then reinstall Dropbox and let it move all my files bact to $home/Dropbox.

This was several GB of stuff and it took over a day. It seems to be cleaning up now and the files are back where they were supposed to be.

Yes, Thank you!

bn.BUILD_KEY: Dropbox
bn.VERSION: 125.4.3474
bn.constants.WINDOWS_SHELL_EXT_VERSION: 48
bn.is_frozen: True
machine_id: 2c3c648f-c737-5a9a-abee-fc58ad5e4850
pid: 765
ppid: 1
uid: 501
user_info: pwd.struct_passwd(pw_name='victoriabaum', pw_passwd='********', pw_uid=501, pw_gid=20, pw_gecos='Victoria Baum', pw_dir='/Users/victoriabaum', pw_shell='/bin/bash')
effective_user_info: pwd.struct_passwd(pw_name='victoriabaum', pw_passwd='********', pw_uid=501, pw_gid=20, pw_gecos='Victoria Baum', pw_dir='/Users/victoriabaum', pw_shell='/bin/bash')
euid: 501
gid: 20
egid: 20
group_info: grp.struct_group(gr_name='staff', gr_passwd='*', gr_gid=20, gr_mem=['root'])
effective_group_info: grp.struct_group(gr_name='staff', gr_passwd='*', gr_gid=20, gr_mem=['root'])
DYLD_LIBRARY_PATH: None
cwd: '/'
real_path='/'
mode=0o40755 uid=0 gid=0
parent mode=0o40755 uid=0 gid=0
HOME: '/Users/victoriabaum'
appdata: '/Users/victoriabaum/.dropbox/instance1'
real_path='/Users/victoriabaum/.dropbox/instance1'
mode=0o40700 uid=501 gid=20
parent mode=0o40700 uid=501 gid=20
dropbox_path: '/Users/victoriabaum/Dropbox'
real_path='/Users/victoriabaum/Dropbox'
mode=0o40700 uid=501 gid=20
parent mode=0o40755 uid=501 gid=20
sys_executable: '/Applications/Dropbox.app/Contents/MacOS/Dropbox'
real_path='/Applications/Dropbox.app/Contents/MacOS/Dropbox'
mode=0o100755 uid=501 gid=20
parent mode=0o40755 uid=501 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/hf/cvc87mbj0pb6sz93j3x81ksc0000gn/T'
real_path='/private/var/folders/hf/cvc87mbj0pb6sz93j3x81ksc0000gn/T'
mode=0o40700 uid=501 gid=20
parent mode=0o40755 uid=501 gid=20
Traceback (most recent call last):
File "dropbox/client/main.pyc", line 819, in wrapper
File "dropbox/client/main.pyc", line 6472, in finish_dropbox_boot
File "dropbox/client/message_queue.pyc", line 307, in _wrapped
File "dropbox/client/main.pyc", line 6005, in _init_components_for_account
File "dropbox/client/main.pyc", line 5932, 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 275, in __init__
File "dropbox/sync_engine/nucleus/classic_client/modern_client/modern_client.pyc", line 219, in __init__
File "dropbox/sync_engine/nucleus/classic_client/modern_client/base.pyc", line 149, in __init__
File "dropbox/sync_engine/nucleus/classic_client/thin_adapter/in_proc.pyc", line 223, in __init__
File "dropbox/sync_engine/nucleus/classic_client/thin_adapter/in_proc.pyc", line 597, in _init_new_engine_locked
File "dropbox/sync_engine/nucleus/thin_client/client.pyc", line 182, in __init__
File "extensions/nucleus/nucleus_python.pyx", line 76, in nucleus_python.NucleusSyncEngine.__cinit__
nucleus_python.SyncEngineError: "Initializing engine |>> Initializing filesystem |>> Attempting to register icons |>> Opening dst |>> open syscall |>> Permission denied"

Same problem here. New iMac, BigSur 11.6, transfer all old data through TimeMachine backup and now Dropbox can't start with this error .

No way. I tried everything I found here and other sites

This is the log: