I'm sorry to hear that you're having issues with PS4 bedrock edition. That said, please visit and report this issue at bugs.mojang.com/secure/Dashb… for a possible solution. ^EG
We can assist with Windows 10 codes once you've sent us an email at help.minecraft.net/hc/en-us/…. Remember to attach your Transaction ID for the Java account. ^EG
Please check your internet connectivity. Also check your parental settings to make sure that cross-platform permissions have been granted. You can verify that in your account at Xbox.com.
We can assist with Windows 10 codes once you've sent us an email at help.minecraft.net/hc/en-us/…. Remember to attach your Transaction ID for the Java account. ^EG
To elaborate, all PS4 owners need a Microsoft account for crossplay. Once you have one, you can go to XBOX.com to verify it's been turned on. See the following link for more info: help.minecraft.net/hc/en-us/… ^EG