We are facing the below error message while trying the send the order from “Order Quotation Approvals” screen for Budget controller approval -

Server error messages:
57ca13c7-277d-4e8b-b642-53a078e5a8b7

Ifs.Fnd.FndSystemException: Unexpected error while calling server method AccessPlsql/Invoke ---> Ifs.Fnd.FndServerFaultException: ORA-06550: line 15, column 571:
PLS-00103: Encountered the symbol " when expecting one of the following:

   ( - + case mod new null <an identifier>
   <a double-quoted delimited-identifier> <a bind variable>
   continue avg count current max min prior sql stddev sum
   variance execute forall merge time timestamp interval date
   <a string literal with character set specification>
   <a number> <a single-quoted SQL string> pipe
   <an alternatively-quoted string literal with character set specification>
   <an alternatively-quoted SQL)

Failed executing statement (ORA-06550: line 15, column 571:
PLS-00103: Encountered the symbol "&" when expecting one of the following:

   ( - + case mod new null <an identifier>
   <a double-quoted delimited-identifier> <a bind variable>
   continue avg count current max min prior sql stddev sum
   variance execute forall merge time timestamp interval date
   <a string literal with character set specification>
   <a number> <a single-quoted SQL string> pipe
   <an alternatively-quoted string literal with character set specification>
   <an alternatively-quoted SQL)
   at Ifs.Fnd.AccessProvider.FndConnection.ParseErrorHeader(FndBuffer buffer, FndManualDecisionCollection decisions)
   at Ifs.Fnd.AccessProvider.FndConnection.UnMarshalResponseHeader(Stream responseStream, FndManualDecisionCollection decisions)
   at Ifs.Fnd.AccessProvider.FndConnection.HandleHttpSuccessResult(HttpWebResponse result, FndManualDecisionCollection decisions, String operation, FndBodyType responseBodyType, Object responseBody)
   at Ifs.Fnd.AccessProvider.FndConnection.InvokeInternal(Object requestBody, Object responseBody, String intface, String operation, FndRequestContext requestContext, FndManualDecisionCollection decisions, Boolean forcedSync)
   --- End of inner exception stack trace ---
   at Ifs.Fnd.AccessProvider.FndConnection.InvokeInternal(String intface, String operation, Object requestBody, Object responseBody, FndRequestContext requestContext, Boolean forcedSync)
   at Ifs.Fnd.AccessProvider.PLSQL.FndPLSQLCommandCollection.Invoke()
   at Ifs.Fnd.AccessProvider.PLSQL.FndPLSQLCommand.ExecuteNonQuery()
   at Ifs.Fnd.AccessProvider.PLSQL.FndPLSQLSelectCommandReader.Read(Boolean prepare)
   at Ifs.Fnd.Data.ADONetProvider.FndAPCommand.ExecuteDbDataReader(CommandBehavior behavior)

I am unable to understand exactly why i am facing this as there where not change made in the system, and it worked fine until last week.

Appreciate your help and response !!