Dropbox will not start on my M2 MacBook Air

NOTE that I can get Dropbox to install by creating an empty fake HOME (user folder) \qzmbp, and it then creates the Dropbox folder in \qzmba\dropbox (and users\qzmbp remains empty).

BUT when I try to update Dropbox "to work on the latest version of macOS" (I am on Ventura latest BTW), I get the "Dropbox cannot start" error message and the following log (hopefully the relevant part): 

HOME: '/Users/qzmba'
appdata: '/Users/qzmbp/.dropbox/instance1'
real_path='/Users/qzmbp/.dropbox/instance1'
mode=0o40700 uid=501 gid=80
parent mode=0o40755 uid=501 gid=80
dropbox_path: '/Users/qzmba/Library/CloudStorage/Dropbox'
real_path='/Users/qzmba/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/76/x2_n5zx54rn5b21jhz25t3qc0000gn/T'
real_path='/private/var/folders/76/x2_n5zx54rn5b21jhz25t3qc0000gn/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 803, in wrapper
File "dropbox/client/main.pyc", line 6289, in finish_dropbox_boot
File "dropbox/client/message_queue.pyc", line 306, in _wrapped
File "dropbox/client/main.pyc", line 5816, in _init_components_for_account
File "dropbox/client/main.pyc", line 5740, 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 244, in __init__
File "dropbox/sync_engine/nucleus/classic_client/modern_client/modern_client.pyc", line 322, in __init__
File "dropbox/client/gandalf/legacy.pyc", line 296, in add_on_changed_callback
File "dropbox/sync_engine/nucleus/classic_client/modern_client/modern_client.pyc", line 473, in _update_feature_configs
File "dropbox/sync_engine/nucleus/classic_client/modern_client/modern_thin_client.pyc", line 286, in UpdateFeatureConfigForFswRules
File "dropbox/sync_engine/nucleus/thin_client/fp_client.pyc", 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=0x600000700510 {Error Domain=NSCocoaErrorDomain Code=4099 "Error while sending fetchServicesForItemID:allowRestrictedSources:completionHandler:" UserInfo={NSDebugDescription=Error while sending fetchServicesForItemID:allowRestrictedSources:completionHandler:, NSUnderlyingError=0x600000700480 {Error Domain=NSCocoaErrorDomain Code=4099 "The connection from pid 1199 on anonymousListener or serviceListener was invalidated from this process." UserInfo={NSDebugDescription=The connection from pid 1199 on anonymousListener or serviceListener was invalidated from this process.}}}}}