All tables implemented within your plugin must follow our frankenstyle naming rules - table names like "objetivo" and "tarea" and "quiz_asignados" are not valid. All tables implemented within your plugin must start with the prefix "block_objetivos" - valid table names would be:
"block_objetivos"
"block_objetivos_tarea"
"block_objetivos_quiz"
All tables implemented within your plugin must follow our frankenstyle naming rules - table names like "objetivo" and "tarea" and "quiz_asignados" are not valid. All tables implemented within your plugin must start with the prefix "block_objetivos" - valid table names would be: "block_objetivos" "block_objetivos_tarea" "block_objetivos_quiz"
please see here for more detail: https://moodledev.io/general/development/policies/codingstyle/frankenstyle#table-names
note this is a blocker for plugins db approval.