Undefined property: Proxy::whosonline in

I have had oc 2.3.0.2 installed and have now switched to oc3.0.3.2 and only copied over the database to the new installation. Everything works as it should in admin, but when I check the browser I get the following message:
Notice: Undefined property: Proxy :: whosonline in /home/m/midgard/storage/modification/system/engine/action.php on line 79
Anyone know how to fix it? - need to have my store up. Please help.

You have to run install for upgrade....and not just replace files.
Disable all ocmod extensions and check.

I have got a new problem now - I cant go into my admin/system/settings to save my database, and when I try to - I get this message:

Uncaught exception 'Exception' with message 'Error: Unknown column 'username'
in 'order clause'<br />Error No: 1054<br />SELECT * FROM `oc_api` ORDER BY username ASC' in /home/m/midgard/www/system/library/db/mysqli.php:40 Stack trace:
#0 /home/m/midgard/www/system/library/db.php(45): DB\MySQLi->query('SELECT * FROM `...')
#1 /home/m/midgard/www/admin/model/user/api.php(77): DB->query('SELECT * FROM `...')
#2 [internal function]: ModelUserApi->getApis()
#3 /home/m/midgard/storage/modification/system/engine/loader.php(248): call_user_func_array(Array, Array)
#4 [internal function]: Loader->{closure}(Array, Array)
#5 /home/m/midgard/www/system/engine/proxy.php(47): call_user_func_array(Object(Closure), Array)
#6 /home/m/midgard/www/admin/controller/setting/setting.php(552): Proxy->__call('getApis', Array)
#7 /home/m/midgard/www/admin/controller/setting/setting.php(552): Proxy->getApis()
#8 [internal function]: ControllerSettingSetting->index()
#9 /home/m/midgard/storage/modification/system/engine/action.php(79):
in /home/m/midgard/www/system/library/db/mysqli.php on line 40

I dont have 'username' in my database only 'user' - and that probably depends on my copying between new and old database, but I dont now how to fix it.
If Install oc again it will probably overwrite my database since it changes the config.php and creates an new database?

In my browser I get this:
Error: A theme has not been assigned to this store!

Is there any chance to fix all this?

The way you upgrade surely you will run into many problems.
My suggestions.
1) do you have backup of your working site/old database if do have then upload back it to server as you said you need store up.
2) work on local host/setup a sub domain to work with upgrade to latest versions whatever you want to update.

You cannot use a V2 database with a V3 installation, tables are different, fields are different, it's as simple as that.
You can try but you will go from issue to issue beyond Christmas.

Ugh, I just wanted to make a simlpe upgrade from v2 to v3 without loosing by database, and my database was overwritten, so I try to save as much as I can.
I cant go back to older version because it is all deleted. My server doesnt support higher than 5.4 php. So even if I insatall newer version of oc, I need to have my database or I will loose all my customers - and that cant be.
I dont know what to do now. Isnt there any chance to change 'username' to 'user' in all files?

ok, I tried to restore my database into localhost and got message:
SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data
OK
<br />
<b>Fatal error</b>: Uncaught Exception: Error: Unknown column 'company_id' in 'field list'&lt;br /&gt;Error No: 1054&lt;br /&gt;INSERT INTO `oc_address` (`address_id`, `customer_id`, `firstname`, `lastname`, `company`, `address_1`, `address_2`, `city`, `postcode`, `country_id`, `zone_id`, `custom_field`, `company_id`, `tax_id`) VALUES ('4', '4', 'Gunnel', 'Cirverius', '', 'Sickla kanalgata 7', '', 'Stockholm', '12067', '203', '3088', '', '0', '0') in C:\xampp\htdocs\opencart\install\system\library\db\mysqli.php:40
Stack trace:
#0 C:\xampp\htdocs\opencart\install\system\library\db.php(45): DB\MySQLi-&gt;query('INSERT INTO `oc...')
#1 C:\xampp\htdocs\opencart\install\admin\controller\tool\backup.php(103): DB-&gt;query('INSERT INTO `oc...')
#2 C:\xampp\htdocs\opencart\install\system\engine\action.php(79): ControllerToolBackup-&gt;import()
#3 C:\xampp\htdocs\opencart\install\admin\controller\startup\router.php(26): Action-&gt;execute(Object(Registry), Array)
#4 C:\xampp\htdocs\opencart\install\system\engine\action.php(79): ControllerStartupRouter-&gt;index()
in <b>C:\xampp\htdocs\opencart\install\system\library\db\mysqli.php</b> on line <b>40</b><br />

is it still about the version of database not fitting to opencart?

Well, yes.
You copied the V2 DB to be used with your V3 installation so you still have your V2 database.
Suggest you re-install V2 or recover your old V2 and use your V2 database.

You don't have back-ups?
If that server doesn't support PHP 7.0....change it.

Ok, Thanks , I will try that.
Can I then upgrade to v3 again and my database will follow ?

Well, yes, you will still encounter issues but not self inflicted nor of this magnitude.

I want to thank you all for your answers and adwises.
I have now restored my website back to v2 and also migrated to a new server, and my store is up again. It solved all my problems.
I will later on download the newest version of Opencart - but for now I am just happy to be back on track.
Many, many thanks.

Kalena wrote: ↑

Tue Aug 11, 2020 12:55 am

I want to thank you all for your answers and adwises.
I have now restored my website back to v2 and also migrated to a new server, and my store is up again. It solved all my problems.
I will later on download the newest version of Opencart - but for now I am just happy to be back on track.
Many, many thanks.

Great, please add word [Solved] in the beginning of post title.
Thanks