Login page is not displayed intermittently

Hello!
A very interesting situation! The login page and the admin panel work for several minutes (from 2 to 10 minutes), then for about half an hour this page does not open, giving an error “Oops! Something went wrong!”. Then everything works again and so on in a circle
A bit of history.
Updated from php 7.2 to php 7.3. Ubuntu 18.04 with the latest updates. Such a thing began to appear. Then just in case I updated Libretime with git from GITHUB (latest version).
But the situation has not changed.
I post tail -n 200 /var/log/airtime/zendphp.log and ask for help very much! By the way, if you restart /etc/init.d/apache2 restart, then everything immediately works for several minutes and everything falls off. And my suspicions are that everything falls off when inactive.
2021-01-23T10:06:45+00:00 ERR (3): ССЫЛКА_НА_РАДИО [ErrorController.php:54 - errorAction()] - Произошла внутренняя ошибка.: ErrorException: “continue” targeting switch is equivalent to “break”. Did you mean to use “continue 2”? in /usr/share/airtime/php/vendor/zf1s/zend-form/library/Zend/Form.php:1173
Stack trace:
#0 /usr/share/airtime/php/vendor/composer/ClassLoader.php(444): exception_error_handler(2, ‘“continue” targ…’, ‘/usr/share/airt…’, 1173, Array)
#1 /usr/share/airtime/php/vendor/composer/ClassLoader.php(444): include()
#2 /usr/share/airtime/php/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile(’/usr/share/airt…’)
#3 [internal function]: Composer\Autoload\ClassLoader->loadClass(‘Zend_Form’)
#4 /usr/share/airtime/php/airtime_mvc/application/forms/Login.php(3): spl_autoload_call(‘Zend_Form’)
#5 /usr/share/airtime/php/vendor/composer/ClassLoader.php(444): include(’/usr/share/airt…’)
#6 /usr/share/airtime/php/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile(’/usr/share/airt…’)
#7 [internal function]: Composer\Autoload\ClassLoader->loadClass(‘Application_For…’)
#8 /usr/share/airtime/php/airtime_mvc/application/controllers/LoginController.php(52): spl_autoload_call(‘Application_For…’)
#9 /usr/share/airtime/php/vendor/zf1s/zend-controller/library/Zend/Controller/Action.php(516): LoginController->indexAction()
#10 /usr/share/airtime/php/vendor/zf1s/zend-controller/library/Zend/Controller/Dispatcher/Standard.php(308): Zend_Controller_Action->dispatch(‘indexAction’)
#11 /usr/share/airtime/php/vendor/zf1s/zend-controller/library/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#12 /usr/share/airtime/php/vendor/zf1s/zend-application/library/Zend/Application/Bootstrap/Bootstrap.php(105): Zend_Controller_Front->dispatch()
#13 /usr/share/airtime/php/vendor/zf1s/zend-application/library/Zend/Application.php(384): Zend_Application_Bootstrap_Bootstrap->run()
#14 /usr/share/airtime/php/airtime_mvc/application/airtime-boot.php(84): Zend_Application->run()
#15 /usr/share/airtime/php/airtime_mvc/public/index.php(68): require_once(’/usr/share/airt…’)
#16 {main}

Php 7.3 is not currently supported because the legacy code we are depending on with both propel ORM and Zend1 include a lot of deprecated php functions. At least for 7.4 included with 20.04 Propel currently doesn’t work and the project owners have not merged fixes whereas with Zend we are using a fork that does implement changes.

Your best bet would be to revert back to Php 7.2.

Thank you very much! I rolled back, everything works.