When cloning Package from Github with PLCNEXT, I will introduce how to solve it even when the error “SSL Certificate problem certificate is not yet valid” appears.

Actually, this is a problem not only in PLCNEXT, but in Linux, and this error will occur if the time is not correct.

NTP Client Setup

Login the WBM into your CPU, go to Configuration>Data and Time.

Now we know the time does not match.

Press the + Button inside the NTP Client Configuration.

A NTP Server configuration screen is shown.

Here is the NTP server that I used.

ntp.nict.jp

Min. polling time is the min of Update Cycle Time, and Max. polling time is the maximum Update Cycle Time and the update is randomly in this range.

The configuration is done.

Please do not forget to apply for it.

Press OK to apply it .

Result

The current time is updated!

Now you can clone the packages from github without any error.