Error: IO Exception: Read timed out

My questions are:

1. Why is the wizard complaining about the parent and the child on screen 1?

2. Why is my rollup working in my dev org but in my sandbox I get "IO Exception: Read timed out"? Could it be the difference in the Salesforce release? Or the renamed Account object in the sandbox?

Here are the details:

Using the Wizard in preview Spring '24 sandbox, I chose the Account object (which was renamed in this org to "Organization" pre-me, don't ask!) to "Organization (Account)". When I try to save (on the first screen) it says the parent does not exist and the child does not exist. It hasn't asked me for the child yet.

When I try it without the wizard, I'm getting 

"Error:IO Exception: Read timed out"

So I next installed DLRS in my Winter '24 dev org. Wizard gives me the same message - parent doesn't exist and child doesn't exist. Account has not been renamed in this org. And I haven't had a chance to select a child yet. 

Without the wizard, I was able to save, deploy, and successfully calculate the rollup in my Winter '24 dev org with these values (it also contains this custom object and fields. I cut and pasted field API names in each org):

Parent Object: Account

Child Object: Food_Trip__c

Relationship Field: Food_Recipient__c

Field to Aggregate: Trip_Date__c

Field to Order by Trip_Date__c (do I need to specify this?)

Aggregate Operation: First

Aggregate Result Field: First_Completed_Delivery__c

Active

Realtime

User

Both orgs have DLRS v2.19

Thank you!

#DLRS Package #DLRS #Declarative Lookup Rollup Summaries @Stephane Plancke @Commons Project: DLRS