Contradiction with Proverbs 4:19
This verse describes the way of the wicked as darkness, where they stumble, which contrasts with Psalms 77:19 describing God's path as being in the sea and not known, implying guidance and an unseen path rather than stumbling in darkness.
Proverbs 4:19: The way of the wicked [is] as darkness: they know not at what they stumble.
Contradiction with Isaiah 55:8-9
These verses state that God's ways and thoughts are higher than ours, which can contrast with Psalms 77:19 if interpreted as God's ways being beyond understanding, instead of being unseeable.
Isaiah 55:8-9: For my thoughts [are] not your thoughts, neither [are] your ways my ways, saith the LORD.