Hi @debug-1,
for me the problem was that the serialized data in database was malformed.
Script on line 45 in file /admin/class-enhanced-ecommerce-google-analytics-settings.php could not properly unserialize that data.
Deleting option “ee_options” from database fixed it and i could insert proper config once again. Unfortunately i could not find the cause for this to happen in the first place.
Hope that solves it for you.
Best regards