QB seems to write a very long audit log somewhere and so it is failing. Maybe the data type for the table column is to tight or the audit log string is too long.

LOG:
2017-03-03 11:49:54 CET [139790-1] quickbuild-stg@quickbuild-stg ERROR: value too long for type character varying(255)
2017-03-03 11:49:54 CET [139790-2] quickbuild-stg@quickbuild-stg STATEMENT: / insert com.pmease.quickbuild.model.Audit / insert into QB_AUDIT (QB_ACTION, QB_CONTENT, QB_PREVIOUS_CONTENT, QB_SOURCE, QB_TIMESTAMP, QB_USER, QB_ID) values ($1, $2, $3, $4, $5, $6, $7)

Also the QB server log shows a lot of these:
2017-03-03 11:49:40,016 [pool-1-thread-1676] WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper - SQL Error: 0, SQLState: 22001
2017-03-03 11:49:40,016 [pool-1-thread-1676] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - ERROR: value too long for type character varying(255)
2017-03-03 11:49:40,042 [pool-1-thread-1685] WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper - SQL Error: 0, SQLState: 22001
2017-03-03 11:49:40,043 [pool-1-thread-1685] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - ERROR: value too long for type character varying(255)
2017-03-03 11:49:40,063 [pool-1-thread-1690] WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper - SQL Error: 0, SQLState: 22001
2017-03-03 11:49:40,064 [pool-1-thread-1690] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - ERROR: value too long for type character varying(255)
2017-03-03 11:49:40,080 [pool-1-thread-1724] WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper - SQL Error: 0, SQLState: 22001
2017-03-03 11:49:40,081 [pool-1-thread-1724] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - ERROR: value too long for type character varying(255)
2017-03-03 11:49:40,155 [pool-1-thread-1764] WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper - SQL Error: 0, SQLState: 22001
2017-03-03 11:49:40,156 [pool-1-thread-1764] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - ERROR: value too long for type character varying(255)
2017-03-03 11:49:40,181 [pool-1-thread-1824] WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper - SQL Error: 0, SQLState: 22001
2017-03-03 11:49:40,181 [pool-1-thread-1824] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - ERROR: value too long for type character varying(255)
2017-03-03 11:49:40,181 [pool-1-thread-1830] WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper - SQL Error: 0, SQLState: 22001
2017-03-03 11:49:40,182 [pool-1-thread-1830] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - ERROR: value too long for type character varying(255)
2017-03-03 11:49:40,195 [pool-1-thread-1880] WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper - SQL Error: 0, SQLState: 22001
2017-03-03 11:49:40,196 [pool-1-thread-1880] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - ERROR: value too long for type character varying(255)
2017-03-03 11:49:40,201 [pool-1-thread-1918] WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper - SQL Error: 0, SQLState: 22001
2017-03-03 11:49:40,202 [pool-1-thread-1918] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - ERROR: value too long for type character varying(255)
2017-03-03 11:49:40,202 [pool-1-thread-1893] WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper - SQL Error: 0, SQLState: 22001
2017-03-03 11:49:40,202 [pool-1-thread-1893] ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper - ERROR: value too long for type character varying(255)