Format of the initialization string does not conform to specification starting at index 138. (4309441)

Format of the initialization string does not conform to specification starting at index 138.

Error: Format of the initialization string does not conform to specification starting at index 138. Stack: at System.Data.Entity.Core.EntityClient.Internal.DbConnectionOptions.GetKeyValuePair(String connectionString, Int32 currentPosition, StringBuilder buffer, String& keyname, String& keyvalue) at System.Data.Entity.Core.EntityClient.Internal.DbConnectionOptions.ParseInternal(IDictionary`2 parsetable, String connectionString, IList`1 validKeywords) at System.Data.Entity.Core.EntityClient.Internal.DbConnectionOptions..ctor(String connectionString, IList`1 validKeywords) at System.Data.Entity.Core.EntityClient.EntityConnection.ChangeConnectionString(String newConnectionString) at System.Data.Entity.Internal.LazyInternalConnection.Initialize() at System.Data.Entity.Internal.LazyInternalConnection.CreateObjectContextFromConnectionModel() at System.Data.Entity.Internal.LazyInternalContext.InitializeContext() at System.Data.Entity.Internal.InternalContext.Initialize() at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() at System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext() at System.Data.Entity.Infrastructure.DbQuery`1.System.Linq.IQueryable.get_Provider() at System.Linq.Queryable.Any[TSource](IQueryable`1 source, Expression`1 predicate) at Metalogix.Agent.Database.RepositoryBase.DatabaseDo[T](Func`2 func) at Metalo

All the characters below are invalid to be set as passwords for SQL

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';||, -, *, /, <>, <, >, ,(comma), =, <=, >=, ~=, !=, ^=, (, )

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If using Distributed migration, this error can also trigger if there was an inadvertent space in the connection string, specifically it was “server, port” and not “server,port”