Contradiction with Judges 2:8
The verse mentions the death of Joshua, whereas Judges 2:6 talks about the people being dismissed by Joshua.
Judges 2:8: And Joshua the son of Nun, the servant of the LORD, died, [being] an hundred and ten years old.
Contradiction with Joshua 23:2
This verse implies Joshua summoned the people, which contrasts with Judges 2:6 stating he released them.
Joshua 23:2: And Joshua called for all Israel, [and] for their elders, and for their heads, and for their judges, and for their officers, and said unto them, I am old [and] stricken in age:
Contradiction with Joshua 24:28
Suggests Joshua sent the people away after covenant renewal contradicting the notion in Judges 2:6 that they were already dismissed.
Joshua 24:28: So Joshua let the people depart, every man unto his inheritance.