Here are a few Diablo 4 invalid licenses fixes and workarounds for those seeing error code message 315306 show up on PS4, PS5.
How To Fix Error Code 300010 in Diablo 4 - Console License Issue - N4G
PS5: unable to find a valid license after a while in the queue : r/Diablo
Diablo 4 Unable To Find Valid License PC, Diablo 4 Login Issues
How to Fix Unable to Find a Valid License for Diablo 4 Code 315306? - News
Unable to find valid licence error - ps5 : r/diablo4
Diablo 4 395002, 315306, 300008 and 300202 errors explained
Diablo 4: This Trick Might Fix That 'Unable To Find Valid License' Error - Gameranx
How to fix Diablo 4 error code 315306 for PC and PS5
How to fix Diablo 4 code 315306: Unable to find a valid license
Unable to find a valid license for Diablo 4 Error 315306 Possible Fix
All Diablo 4 error codes and what they mean
How to Fix Unable To Find Valid License Error Code 315306 in Diablo 4
Diablo 4 395002, 315306, 300008 and 300202 errors explained