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Windows error 0x0000011b

Windows cannot connect to a printer shared from another computer. It started with Microsoft security updates in 2021 that tightened how shared printers authenticate.

How to fix it

1. Install all Windows updates on both the computer sharing the printer and the one connecting to it. Most cases are a mismatch between the two.
2. Restart both computers.
3. Better long-term fix: connect to the printer directly by its IP address (Add printer > Add a printer using an IP address) instead of through the other PC.
4. Last resort (IT only, lowers security): on the computer sharing the printer, set the registry value RpcAuthnLevelPrivacyEnabled to 0 under HKLM\System\CurrentControlSet\Control\Print and restart.

Is it worth fixing?

Fixable. Connecting directly by IP address avoids the problem for good.