Error "Unexpected error encountered. Contact System Administrator" when updating a state of a Project Task from planning Console - Support and Troubleshooting

Error "Unexpected error encountered. Contact System Administrator" when updating a state of a Project Task from planning Console Issue When updating the 'State' of a project task from the Planning Console, the following error is displayed:

Cause The 'Short Description' field of the project task had quotes(").

The logs show the following exception:

2019-09-25 15:39:28 (780) Default-thread-6 A83BA7A6DB4C80503BA58D37489619E9 txid=362d27aadb4c WARNING *** WARNING *** java.lang.IllegalArgumentException: Cannot decode: java.io.StringReader@e21668 org.mozilla.javascript.JavaScriptException: java.lang.IllegalArgumentException: Cannot decode: java.io.StringReader@e21668 at org.mozilla.javascript.Context.makeJavaScriptException(Context.java:1935) at org.mozilla.javascript.Context.throwAsScriptRuntimeEx(Context.java:1921)

Resolution Remove the quotes in the short description and save the project task record. Open the Planning console and trying changing the state for the affected project task, it works.