Why can’t I connect to my Codesys logic?

Codesys & I/O Q&A
Why can’t I connect to my Codesys logic? https://forum.weintekusa.com/uploads/db0776/optimized/2X/7/72d9b9bbc5cfb68f0b814d73a044f1a50ee7e202_2_1024x586.jpeg
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Brendon, problem resolved. The “Enable Codesys Login” was off. I dont believe anyone turned it off. Plant personnel had not been into the HMI. However, when we first powered up the unit, we had an I/O alarm because one of the analog modules had no 24vdc connected.
This condition showed an alarm in EasyRemoteI/O.
Is it possible this condition caused the “Enable Codesys Login” to be switched off by the system??
To resolve this we wired 24vdc to analog module and switched the “EnableCodesyLogin” back on and the laptop connected immediately. Thanks for your help.