Update: The fix for this issue was released on 8/28/2020.
Known Issue - The Copy Data From Summer School process needs to be adjusted. Database servers with hyphens in the name are not copying data. The SQL query needs to be adjusted to add escaped brackets around the server name.
This happens if the SQL server not only has a hyphen in the name, but when the databases are on 2 different servers. When the summer school is on the same server, this is not an issue.
Work around is to run the SQL statement that prints in the error email manually, with brackets around the server names.
Note: This issue affects Hosted districts. Please submit a ticket to have the records copied using a SQL statement.