I just made a pull request with a patch to niceTables.pl that makes these two errors go away.
https://github.com/openwebwork/pg/pull/287
Monitor that PR. Once it is merged into master then you can run `git pull origin master` from your pg folder on your server and you should be OK.
If other niceTables.pl issues arise, please let me know.
WeBWorK Problems
Syntax for Data table usage in column displays?
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