Cannot start Dropbox app on Macbook

I was able to solve this on my own. I have no idea if this is the 'officially sanctioned' approach but here is what I did:

** OBLIGATORY WARNING ** This is what I DID. YOU should do your own research and make the best choice for YOUR needs. You should also listen to Dropbox support, not some idiot on the internet. I am not suggesting or advising to try to do this. I am a software engineer with 25 years of experience so this kind of thing is second-nature to me. In other words, I am a professional. If you are not a professional, use at your own risk.

1.  Make a backup of the hidden Dropbox data folder ( yours is at `/Users/YOUR_USER_NAME/.dropbox`). If you are comfortable using the command line (Terminal) you can run `cp -R /Users/YOUR_USER_NAME/.dropbox ~/Downloads/dropbox-data-backup`
2. Then run `rm -R -f /Users/YOUR_USER_NAME/.dropbox`
3. Quit the Dropbox app and relaunch it
4. It will think it is a new install (technically it is)
5. Follow the prompts to set up your Dropbox again. You will have to choose which folders to sync again and let it sync, THEN go through the Mac OS update ther integrates Dropbox with the Finder but for me that was prefarable to waiting on Dropbox support to respond and jumping through a bunch of hoops to probably end up doing something similar. 

** OBLIGATORY WARNING ** This is what I DID. YOU should do your own research and make the best choice for YOUR needs. You should also listen to Dropbox support, not some idiot on the internet. I am not suggesting or advising to try to do this. I am a software engineer with 25 years of experience so this kind of thing is second-nature to me. In other words, I am a professional. If you are not a professional, use at your own risk.

Hi emilialiu, and thanks for posting on our Community!

Can you let me know if you’ve already been in touch with our support team about this? If yes, can you please send me any ticket numbers you may have, so that I can have a look? 

Let me know when you’re ready.

I have this error problem too. Can't find how to contact dropbox support team, but happy for them to contact me on my registered email. I can then send over the longform error code. Thank you in advance! 

Hi! I'm running into the same issue as well and have tried all of the steps in this thread to troubleshoot this issue. I have updated to MacOS Ventura 13.4.1 (22F82). The grey Dropbox Icon no longer pops-up on my menu bar and, while the folder shows up in my finder window, none of my files are syncing and cannot be opened from the folder. I keep getting this same error message with the following text file (see below).

Any help would be greatly appreciated! Please send me an email with directions. 

bn.BUILD_KEY: Dropbox
bn.VERSION: 178.4.4811
bn.constants.WINDOWS_SHELL_EXT_VERSION: 62
bn.is_frozen: True
machine_id: 41c55f76-819e-57a5-9f69-5de2f40cb247
pid: 1948
ppid: 1
uid: 501
user_info: pwd.struct_passwd(pw_name='jcycheung', pw_passwd='********', pw_uid=501, pw_gid=20, pw_gecos='Joey Cheung', pw_dir='/Users/jcycheung', pw_shell='/bin/bash')
effective_user_info: pwd.struct_passwd(pw_name='jcycheung', pw_passwd='********', pw_uid=501, pw_gid=20, pw_gecos='Joey Cheung', pw_dir='/Users/jcycheung', 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', 'jcycheung'])
effective_group_info: grp.struct_group(gr_name='staff', gr_passwd='*', gr_gid=20, gr_mem=['root', 'jcycheung'])
DYLD_LIBRARY_PATH: None
cwd: '/'
real_path='/'
mode=0o40755 uid=0 gid=0
parent mode=0o40755 uid=0 gid=0
HOME: '/Users/jcycheung'
appdata: '/Users/jcycheung/.dropbox/instance1'
real_path='/Users/jcycheung/.dropbox/instance1'
mode=0o40700 uid=501 gid=20
parent mode=0o40700 uid=501 gid=20
dropbox_path: '/Users/jcycheung/Library/CloudStorage/Dropbox'
real_path='/Users/jcycheung/Library/CloudStorage/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/cf/lg668sld5378jpw7s86ywfm00000gn/T'
real_path='/private/var/folders/cf/lg668sld5378jpw7s86ywfm00000gn/T'
mode=0o40700 uid=501 gid=20
parent mode=0o40755 uid=501 gid=20
Traceback (most recent call last):
File "desktop/dropbox/client/main.py", line 830, in wrapper
File "desktop/dropbox/client/main.py", line 6509, in finish_dropbox_boot
File "desktop/dropbox/client/message_queue.py", line 306, in _wrapped
File "desktop/dropbox/client/main.py", line 6041, in _init_components_for_account
File "desktop/dropbox/client/main.py", line 5964, in create_sync_engine
File "desktop/dropbox/sync_engine_boundary/factory.py", line 225, 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 324, in __init__
File "desktop/dropbox/client/gandalf/legacy.py", line 296, in add_on_changed_callback
File "desktop/dropbox/sync_engine/nucleus/classic_client/modern_client/modern_client.py", line 487, in _update_feature_configs
File "desktop/dropbox/sync_engine/nucleus/classic_client/modern_client/modern_thin_client.py", line 286, in UpdateFeatureConfigForFswRules
File "desktop/dropbox/sync_engine/nucleus/thin_client/fp_client.py", line 236, in __getattr__
dropbox.sync_engine.nucleus.thin_client.exceptions.NucleusConnectionTimeoutError: Nucleus clients are not running. Connection error: Error Domain=com.dropbox.fileprovider.error Code=5 "(null)" UserInfo={NSUnderlyingError=0x60000327dda0 {Error Domain=NSCocoaErrorDomain Code=4097 "Error while sending fetchServicesForItemID:allowRestrictedSources:completionHandler:" UserInfo={NSDebugDescription=Error while sending fetchServicesForItemID:allowRestrictedSources:completionHandler:, NSUnderlyingError=0x60000327f420 {Error Domain=NSCocoaErrorDomain Code=4097 "connection from pid 2214 on anonymousListener or serviceListener" UserInfo={NSDebugDescription=connection from pid 2214 on anonymousListener or serviceListener}}}}}

Dropbox app for Mac will not install on mac.

Prompts me to send you the text below which I pasted here as couldn't find a way to attach it as a file.

Please help, thanks.

bn.BUILD_KEY: Dropbox
bn.VERSION: 184.4.6543
bn.constants.WINDOWS_SHELL_EXT_VERSION: 66
bn.is_frozen: True
machine_id: caab14ba-92cb-57c0-ba04-b92ff9621fde
pid: 2471
ppid: 1
uid: 501
user_info: pwd.struct_passwd(pw_name='**', pw_passwd='********', pw_uid=501, pw_gid=20, pw_gecos='ADRIAN **', pw_dir='/Users/**', pw_shell='/bin/zsh')
effective_user_info: pwd.struct_passwd(pw_name='**', pw_passwd='********', pw_uid=501, pw_gid=20, pw_gecos='ADRIAN **', pw_dir='/Users/**', pw_shell='/bin/zsh')
euid: 501
gid: 20
egid: 20
group_info: grp.struct_group(gr_name='staff', gr_passwd='*', gr_gid=20, gr_mem=['root', '**', '_nsurlstoraged'])
effective_group_info: grp.struct_group(gr_name='staff', gr_passwd='*', gr_gid=20, gr_mem=['root', '***', '_nsurlstoraged'])
DYLD_LIBRARY_PATH: None
cwd: '/'
real_path='/'
mode=0o40755 uid=0 gid=0
parent mode=0o40755 uid=0 gid=0
HOME: '/Users/*'
appdata: '/Users/*/.dropbox/instance1'
real_path='/Users/*/.dropbox/instance1'
mode=0o40700 uid=501 gid=20
parent mode=0o40755 uid=501 gid=20
dropbox_path: '/Users/*/Library/CloudStorage/Dropbox'
real_path='/Users/**/Library/CloudStorage/Dropbox'
not found
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/1v/d4lg_nwj3655fppt_gq932wh0000gn/T'
real_path='/private/var/folders/1v/d4lg_nwj3655fppt_gq932wh0000gn/T'
mode=0o40700 uid=501 gid=20
parent mode=0o40755 uid=501 gid=20
Traceback (most recent call last):
File "desktop/dropbox/client/main.py", line 5546, in _setup_root_for_account
File "desktop/dropbox/sync_root/helpers.py", line 520, in get_root_for_account
File "desktop/dropbox/foundation/futures/basic.py", line 858, in result
File "desktop/dropbox/sync_root/handlers/macos/file_provider.py", line 232, in set_result_or_convert_exception
dropbox.mac.internal.MacError: [Errno -2001] Error Domain=NSFileProviderErrorDomain Code=-2001 "No valid file provider found with identifier com.getdropbox.dropbox.fileprovider/8334225e-f1df-41ff-b397-74b2692e7c27." UserInfo={NSLocalizedDescription=No valid file provider found with identifier com.getdropbox.dropbox.fileprovider/8334225e-f1df-41ff-b397-74b2692e7c27.}