Why "Data at the root level is invalid. Line 1, position 1." on ODDataTable.cs ?

[victoracho]

Hello there, I've been trying to mask all phone numbers on the ui of OD, all I want is something like (xxx)(xxx) 4023, which is something I did, nevertheless I compiled source on version 22_3 and connected it on the new files to production using their db, but I cannot find out what is happening that this error appears "Data at the root level is invalid. Line 1, position 1" on the ODDataTable.cs file, which for my understanding doesnt have any explanation why that occurs.