Ore patches now spill over into the sea as submerged variants. Dredge them up with new floating hardware, and build deeper into the blue with water-placeable refined concrete.
Failed to load mods: The given sprite rectangle (left_top=356x0, right_bottom=712x328) is outside the actual sprite size (left_top=0x0, right_bottom=356x1312).
See the log file for more information.: dredgeworks-graphics/graphics/entity/seafloor_drill/remnants/electric-mining-drill-remnants.png
Hm. Hard to conclusively nail anything down in that at a glance; your error isn't occurring in unmodified or Space Age-included Dredgeworks, so if you can turn off (or on) a few mods at a time and locate a particular mod that prompts the error to occur, that would give me something clearer to investigate.
Found out that if https://mods.factorio.com/mod/laser_tanks is active you get the error after deactivating the mod the game loads. But it worked befor the Update 2 Days ago =(
Tried activating that mod alongside Dredgeworks, both with and without Space Age, and can't reproduce the issue. I don't plan to abandon investigation, but no ETA on a fix.