Sorry, i thought you speak russian ))
First, you have to inspect status of loading resources in browser
in FF, for instance:
Для просмотра ссылки Войди или Зарегистрируйся
you need ensure, that all resources have status 200 or 304
then check headers and response of page itself (tabs Headers and Response)
clean generated, recompile di
turn off all caching
in developer mode you should see errors
so i think it may be problem with loading of some js-files or html-templates
or something with php-settings error_reporting, display_errors in htaccess (if you under apache) or index.php
if you still see no errors, add xdebug to php,
set breakpoint in controller or block-file and debug
p.s
If you under windows, you don't need setup:di:compile
just delete generated folder
also manually clean all cache folders
./../var/cache;
./../var/page_cache;
./../var/view_preprocessed;
and static
./../pub/static/
delete all but .htaccess file
deploy static after that
setup:static-content:deploy -f -s standard
when you switch between modes, use --skip-compilation option
magento deploy:mode:set developer --skip-compilation
under linux run compile
magento setup:di:compile
under windows delete generated folder
then manually deploy static content
magento setup:static-content:deploy -f -s standard
then manually clean all cache folders as shown above
then run
magento cache:flush
and also when you develop, turn off some caches
magento cache:disable config layout block_html full_page translate
reindex all, just in case
magento indexer:reindex