'Browse server log files' is broken on new Confluence/new Scriptrunner

Steps: 

1. In SR4C go to Built-in Scripts 
2. Select View server log files
3. Try to execute for each of the 2 log files. 

Expected:

Both log files to return number of rows selected

Actual:

Error for both log files see screenshots. Add automated test as well as part of fix. 

Customer Description:

See screen shot-
worked perfectly before upgrade of Confluence+scriptrunner

Big issue for me- I feel like my eyes where blinded...