error connection data source sql server

[Anonymous]

when entering to create a new one or use a connection with sql server I get this error: unable to get value of the property 'contains' object is null or undefined

http://img.fenixzone.net/i/QYHVcIR.png  

please help me

[edhans]

What do you see when you go into the query in Power Query? You may get more info there vs the end result that DAX sees.

Click EDIT QUERIES, then look for queries with a yellow exclamation mark. You might need to REFRESH ALL in Power Query to show the errors.

[Anonymous]

Hi friend, delete all the pbi sheets and create new files and try to connect and I get that error. 
I also get to recover files that have old connections and I can't close the pbi, to close it I have to kill the process