Problems after booting from external SSD

[Wando64]

I have been CCC cloning a Catalina iMac Fusion Drive onto an external SSD formatted APFS, GUID partition, with the intention of using the external SSD as my boot drive.
It boots fine from it, however Safari does not work (immediately quits unexpectedly) and I cannot make purchases from the apple store (cannot complete operation).
There could be other problems but at this point I just re-booted from the internal Fusion drive.

What could be the problem and how can I fix it, or at least attempt some further troubleshooting?
I’ve named the SSD “Macintosh SSD” could this be part of the issue? Does it need to be named “Macintosh HD”?

Thanks

 

[Fishrrman]

The drive can be ANY name that you want it to be named.
The Mac OS doesn't care about that.

I would try going into your home folder and doing the following:
- Go to home/library/caches and delete the folder com.apple.safari
- Go to home/library/preferences and delete the com.apple.safari plist files in there.
Try launching Safari now.

Tell us about the iMac you have -- what year.
Tell us about the fusion drive -- what size.

 

[Wando64]

The drive can be ANY name that you want it to be named.
The Mac OS doesn't care about that.

I would try going into your home folder and doing the following:
- Go to home/library/caches and delete the folder com.apple.safari
- Go to home/library/preferences and delete the com.apple.safari plist files in there.
Try launching Safari now.

Tell us about the iMac you have -- what year.
Tell us about the fusion drive -- what size.

Thanks for your reply.
iMac 21.5 2017, 16GB RAM, 1TB Fusion, and by the way it is Mojave, not Catalina as I said in my original post.
The Fusion has 350GB unused. The SSD is 1TB so size is not an issue.
It is actually the computer of a friend of mine and I am trying to do this for her remotely (we are in lockdown in the UK).

I think I will first reformat the SSD and repeat the cloning process from scratch in case something got corrupted the first time around (a rather unlikely possibility, but worth a try).
If I still get the same problem I will try your suggestion. Some people also are suggesting to reinstall MacOS from the recovery partition. This should leave all of the settings and user programs alone.

Regardless of the outcome, this is leaving me rather unsettled about using this method again the future.
I have always trusted CCC blindly, and this should just not happen as far as my understanding of the process goes.
I have used the same method to replace the fusion drive on my Mini with an SSD and I had no problems whatsoever, so what the heck is going on here?

By the way the Safari error (from the error log) is as follows:
"Sandbox registration failed: The code signature is not valid: The operation couldn’t be completed. (OSStatus error -67030.)"

As for the App store, it just reports that "we cannot complete your purchase. Cancelled."

 

[Wando64]

The drive can be ANY name that you want it to be named.
The Mac OS doesn't care about that.

I would try going into your home folder and doing the following:
- Go to home/library/caches and delete the folder com.apple.safari
- Go to home/library/preferences and delete the com.apple.safari plist files in there.
Try launching Safari now.

Tell us about the iMac you have -- what year.
Tell us about the fusion drive -- what size.

Deleting the caches and plist didn't solve the problem.
I will now recreate the clone in the hope it will solve the problem.