SQLSTATE[42S02]: Base table or view not found: 1932 Table 'linnhr.department' doesn't exist in engine (SQL: select * from `department`) code example

Example: SQLSTATE[42S02]: Base table or view not found: 1146 Tabl

It seems Laravel is trying to use category_posts table (because of many-to-many relationship). But you don't have this table, because you've created category_post table. Change name of the table to category_posts.