I desperately need some help.
I've tried to solve it since 3 days, read all relevant topic in this forum, googled it but no success.

OC: 2.0.3.1
Theme: Journal2
Related extensions: - (I think none of them)
A link to your site: https://kristalycentrum.com/
Is it a single or multistore setup: Single
Problem:
In My Account customers can't edit/modify their address (Address books - Modify your address book entries), and cannot add new address either.
The result is a blank (white) page with this urls:
https://www.mydomain.com/index.php?route=account/address/edit&address_id=573
https://www.mydomain.com/index.php?route=account/address/add
Every other links/menu works correctly in My Account.
From admin area (as an administrator) I can add, or modify a Customer's address.
In checkout process customer also can modify or add new address.
So the problem is only exist in My Account.
Some solution I've tried (without success):
1. In error logs I found only one log can be related:
I've checked the files and route for address_list.tpl is not like above but this is: catalog/view/theme/journal2/template/account/address_listPHP Notice: Error: Could not load template /home/.../catalog/view/theme/account/address_list! in /home/.../vqmod/vqcache/vq2-system_modification_system_engine_loader.php on line 64
So I've made an account folder to theme folder, put the file in it, but no success.
2. I've tried to switch back server php version from 7 to 5.6 but no success.
3. Temporarly deleted .htaccess from root but nothing changed.
4. Tried to replace the address.php file in /catalog/controller/account/ directory to newer version (2.1.0.1, 2.1.0.2 - nothing changed; 2.3.0.2 - worse than ever).
I would be grateful for any idea what could help me out...
Thanks in advance!