CB Blogs likely isn't compatible with Joomla 4. We're working through all Joomla 4 issues still. Have added a bug ticket to investigate and fix.

forge.joomlapolis.com/issues/8695

You're going to hit a lot of roadblocks using Joomla 4 this early. Most extensions are still working through compatibility. Just a heads up to be aware of this.

This issue along with several style conflicts have now been fixed in latest build release.

Since I purchased the memberships and but all of the apps don't work, what happens in 6 months when most of the apps work but now I can't download them because my membership will be over.

Unless you renew you will lose access to download paid products (everything already installed will continue to work fine) and thus updates to those paid products. Core CB is free so you will of course be able to download core CB updates.

It's like I purchase an app-in-transit and when it's ready, I won't be able to use it.

We're prioritizing all J4 issues and fixing them as quickly as possible (usually same day or within 1-2 business days of being reported). This is just the nature of software. There will always be bugs and will do our best to fix them as quickly as possible.

Will you give those who purchase your memberships some kind of mulligan (golf terms for a second chance), so I won't have to purchase another membership for $100???

No, this is just how software works. Software is a constant maintenance. Without an active subscription you'll always likely miss out on something. If it isn't a J4 conflict fix it could be some other bug or feature. Some issues, like this topic, are in CBs core code and core CB is free so you of course don't need a subscription for such fixes.

That would be helpful and I would gladly help with going through all of the apps and testing them to get this whole thing going faster.

All bug reports are certainly appreciated and we will fix them as quickly as possible as they are found.