I can't open the app, reinstalling doesn't work.

bn.BUILD_KEY: Dropbox
bn.VERSION: 221.3.5302
bn.constants.WINDOWS_SHELL_EXT_VERSION: 78
bn.is_frozen: True
machine_id: 91f27fe6-eeae-5525-8d5a-14d73d3296de
pid: 2109
ppid: 1
uid: 501
user_info: pwd.struct_passwd(pw_name='nando', pw_passwd='********', pw_uid=501, pw_gid=20, pw_gecos='Nando Martorana', pw_dir='/Users/nando', pw_shell='/bin/bash')
effective_user_info: pwd.struct_passwd(pw_name='nando', pw_passwd='********', pw_uid=501, pw_gid=20, pw_gecos='Nando Martorana', pw_dir='/Users/nando', 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', '_serialnumberd'])
effective_group_info: grp.struct_group(gr_name='staff', gr_passwd='*', gr_gid=20, gr_mem=['root', '_serialnumberd'])
DYLD_LIBRARY_PATH: None
cwd: '/'
     real_path='/'
               mode=0o40755    uid=0    gid=0
     parent    mode=0o40755    uid=0    gid=0
HOME: '/Users/nando'
appdata: '/Users/nando/.dropbox/instance1'
         real_path='/Users/nando/.dropbox/instance1'
                   mode=0o40700    uid=501    gid=20
         parent    mode=0o40700    uid=501    gid=20
dropbox_path: '/Volumes/256_Gb_Samsung/MEGA_Sync/Dropbox'
              real_path='/Volumes/256_Gb_Samsung/MEGA_Sync/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/0s/sv6ltcqj7z16tspfbw1lww1w0000gn/T'
         real_path='/private/var/folders/0s/sv6ltcqj7z16tspfbw1lww1w0000gn/T'
                   mode=0o40700    uid=501    gid=20
         parent    mode=0o40755    uid=501    gid=20
Traceback (most recent call last):
  File "desktop/dropbox/fs_api/lifecycle.py", line 235, in client
  File "desktop/dropbox/fs_api/lifecycle.py", line 283, in _create_thin_client
  File "desktop/dropbox/fs_api/fs_api_adapter.py", line 50, in __init__
  File "desktop/extensions/fs_api/fs_api_python.pyx", line 63, in fs_api_python.FsApiServer.__cinit__
fs_api_python.FsApiError: "Initializing fs api |>> Initializing platform |>> Opening worker root directory |>> open syscall |>> FSErrorCode::PermissionDenied"

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "desktop/dropbox/client/main.py", line 971, in wrapper
  File "desktop/dropbox/client/main.py", line 7289, in finish_dropbox_boot
  File "desktop/dropbox/client/message_queue.py", line 306, in _wrapped
  File "desktop/dropbox/client/main.py", line 6698, in _init_components_for_account
  File "desktop/dropbox/client/main.py", line 6619, in create_sync_engine
  File "desktop/dropbox/sync_engine_boundary/factory.py", line 212, in make_sync_engine
  File "desktop/dropbox/sync_engine/nucleus/classic_client/sync_engine.py", line 243, in __init__
  File "desktop/dropbox/sync_engine/nucleus/classic_client/modern_client/modern_client.py", line 300, in __init__
  File "desktop/dropbox/sync_engine/nucleus/classic_client/modern_client/base.py", line 242, in __init__
  File "../mac_x86_64_dropbox_virtual_env/lib/python3.8/functools.py", line 967, in __get__
  File "desktop/dropbox/fs_api/lifecycle.py", line 259, in client
dropbox.fs_api.lifecycle.FsApiClientCreationException: "Initializing fs api |>> Initializing platform |>> Opening worker root directory |>> open syscall |>> FSErrorCode::PermissionDenied"