I’ve purchased a developer license but keep getting a “Your ICS Calendar Pro license has expired” message on sites. I’m able to reactivate the license but it has become a bit of a hassle and I will have many sites to do this on soon. I’m running a multisite install and there is caching enabled through our host.
Hi, I’m sorry to hear you’re running into this issue. I may need to have you fill out the Pro Support Request Form with your System Report so I can investigate further.
One thing you may want to try though is setting up the R34ICSPRO_INSTANCE constant in your wp-config.php file. See the section under Using a load balancer (e.g. Cloudflare)? on the ICS Calendar → Settings page in your site admin.