This issue with cross save on ps5 has been solved by this method: Change your connected network's dns to google's dns primary 8.8.8.8 and secondary 8.8.4.4(On your ps5, settings>network>your network's advanced options>dns). After that you can upload your save file in the cross save slot in ps5, and load from this slot on steam. Hope this helps anyone who has been facing this issue recently. Cheers!
Note: You don't need ps plus for this
https://i.redd.it/redyov12n0uh1.jpeg
Source: r/CrimsonDesert · by /u/RogueBAE16
