What are these errors when installing the opencart template?

Question

opencart

installed opencart on the server, installed the template. and at the last step of activating the template (when you need to click the edit button in the settings and save the new template in the general ones), an error appears:
Warning: Invalid argument supplied for foreach() in /home/r/rusdav/site address/public_html/system/storage/ modification/system/engine/loader.php on line 53
Notice: Undefined property: Proxy::getLengthClasses in /home/r/rusdav/site address/public_html/admin/controller/setting/setting.php on line 666
All new, none did not touch the files did not rule yet what kind of nonsense?