The operation couldn't be completed installing helper

my log id: fd78e761c0a01a1cb9a27f1c

Installer: 1.1.46
Privileged Helper: Re-Install, Install Error: The operation couldn’t be completed. (CFErrorDomainLaunchd error 9.), Error: XPC Error: Connection invalid, Error, Bundle Version: 1.0.29
Updater: Unknown, 
Service: Unknown, 
Fuse: Unknown, 
Mount directory: Unknown, 
KBFS: Unknown, 
CLI: Unknown, 

Log:
Version: 1.1.46
Installables: (
    "Privileged Helper",
    Updater,
    Service,
    Fuse,
    "Mount directory",
    KBFS,
    CLI
)
Install: Privileged Helper
Connecting to keybase.Helper (privileged=1)
Connected
Retrying (attempt=1, requestId=0) after XPC error: Error Domain=MPMessagePack Code=-10 "XPC Error: Connection invalid" UserInfo={NSLocalizedDescription=XPC Error: Connection invalid, NSLocalizedRecoveryOptions=(
    OK
)}
Connection invalid, clearing connection
Cleared connection
Connecting to keybase.Helper (privileged=1)
Connected
Connection invalid, clearing connection
Retrying (attempt=2, requestId=0) after XPC error: Error Domain=MPMessagePack Code=-10 "XPC Error: Connection invalid" UserInfo={NSLocalizedDescription=XPC Error: Connection invalid, NSLocalizedRecoveryOptions=(
    OK
)}
Cleared connection
Connecting to keybase.Helper (privileged=1)
Connected
Retrying (attempt=3, requestId=0) after XPC error: Error Domain=MPMessagePack Code=-10 "XPC Error: Connection invalid" UserInfo={NSLocalizedDescription=XPC Error: Connection invalid, NSLocalizedRecoveryOptions=(
    OK
)}
Connection invalid, clearing connection
Cleared connection
Connecting to keybase.Helper (privileged=1)
Connected
Max attempts reached (4 >= 4)
Connection invalid, clearing connection
Removing /Library/PrivilegedHelperTools/keybase.Helper
Installing helper tool via SMJobBless
Failed, retrying
Install complete
Privileged Helper: Install Error: The operation couldn’t be completed. (CFErrorDomainLaunchd error 9.)
Error: XPC Error: Connection invalid
Error, Bundle Version: 1.0.29

Ignoring leaves me with a Keybase window that just says "Loading…".

Start with the supplied installer log, especially the Privileged Helper and SMJobBless steps, and investigate the CFErrorDomainLaunchd error 9 and repeated XPC connection failures. Reproduce the helper installation failure on macOS and trace why the client remains on “Loading…”. Done means the helper installs successfully and the Keybase window completes loading.