iOS 12.3 cydia app update error: /usr/libexec/cydia/cydo returned an error code (2)

Met this error when upgrading app in unc0ver jailbroken ios 12.3 cydia. App upgrading failed with error message:

/usr/libexec/cydia/cydo returned an error code (2)

some website says it is due to the command cydo has wrong permission setting, and by setting permission to 06755 will solve it.

either using chmod 06755 to change mod of cydo and respring, or using filza set permission to 06755 and respring. Both are not working.

I found this way is working.

Go to setting of unc0ver, open the setting by clicking the gear on upright corner, set ‘Reinstall Cydia’ and ‘reset Cydia Cache’ to True, and do a re-jailbreak will fix the cydo error issue.

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