Did you input the database ID manually, or mapped from some other module?
If you use the “Search” option in the “Database ID” section of your Notion module in Make > and then type the database name - does Make find the database?
If after following all those steps your connection still doesn’t work, let’s see if we could resolve this directly here, or whether it is a bug/there is something inherently wrong with the Make module/Notion API.
In such a case, could you provide screenshots/text of:
The database ID you are inputting in the Make module
Which Make module you are using
The “Connections” menu in the Notion database you are using