Hi, can you please let us know which version are you using ? Other than that you can take a look at the validation group property on the Blog module, is it set or empty ? Do you have any other modules with the same validation group on the page ? 

We have tested this on our end and it is working as expected, we are using 4.7.4160.

Regards

Thanks.
We're using version v4.5.3205.35.
I've tried with the validation group set at 18446744072480196910 and tried again by leaving the validation group blank. Still get the error "The following issues have to be resolved before you can proceed:
Please fill in the title field!"
Any other idea?

Hi, The functionality is working on a clean database but not on our current database. Does that help point you in the right direction? Thanks

I'm not sure, can you confirm that there is a postback involved when you hit the Publish or this is pure client side validation popping up ?

Hi, Are there logs for postbacks as we cannot find logs?

Error logs should at the following location: /MonoX/ApplicationData/Logs/*.*

Regards