I upgraded from Wordpress 4.8 (I think) to Classicpress beta1, later beta2 and now rc1. The first upgrade to CP was done by the plugin and worked fine. Now in beta1, 2 and now rc1 I get this message in the update-section:
Unable to determine whether a ClassicPress update is available.
You may be running a customized build of ClassicPress, or your server may be having internet connectivity problems.
This happens only on one of my 5 pages running Classicpress. All have done the same migration path.
How can I debug this?
update should work or show that no update is available
I get the message that I run a customized build - see above.
Steps to reproduce
run the update