Verify Table Settings: Go to Maker Portal (https://make.powerapps.com/). Open the environment you are working in. Under Dataverse > Tables, locate the table you want to connect to. Ensure the following: The Enable for OData option is turned on in the table’s Advanced Settings. The table is published.
Check Table Permissions: In the table’s settings, confirm that the table’s permissions allow the data to be read by your account.