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ENM 8.3 does not load tags from Power Monitoring Expert, 'Utility.UpdateEfSourcesException' in the diagnostic page

After configuring ENM to connect to Power Monitoring Expert (PME), ENM is able to observe events coming from PME however no tags are loaded. Diagnostic log contains the following error: 
"An exception of type 'Utility.UpdateEfSourcesException' occurred and was caught."

ENM 8.3 with PME 8.X

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A SQL stored procedure has a variable defined as text rather than nvarchar

*Warning: Irreparable database damage can occur. This procedure should only be performed by users familiar with SQL Server Management Studio. Databases should be backed up prior to performing this procedure.*
1) Open SQL Server Management Studio (SSMS) and connect to the instance where ENM databases are located
2) In the object explorer, expand the databases-> PLES_APM -> Programmability -> Stored Procedures
3) Locate [PLES_APM].[dbo].[usp_MM_xml_UpdateNodeSet] and right click on the procedure -> Tasks -> ALTER to -> New Query Editor Window
4) Search for "@Data text" (without quotes) and replace with "@Data nvarchar(max)" (without quotes)
5) Execute the statement
6) Repeat steps 3 through 5 for the stored procedure [PLES_APM].[dbo].[usp_xml_UpdateNodeSet]
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