Magento 500 error after executing php bin/magento setup:upgrade --keep-generated

hi,
after executing Magento 500 error after executing php bin/magento setup:upgrade --keep-generated command on my magento 2 site . my site is down. some time it is generaing


Warning: file_put_contents(/home/eagleclo/public_html/var/cache//mage-tags/mage---085_CONFIG): failed to open stream: Permission denied in /home/eagleclo/public_html/vendor/colinmollenhour/cache-backend-file/File.php on line 691

Warning: file_put_contents(/home/eagleclo/public_html/var/cache//mage-tags/mage---085_MAGE): failed to open stream: Permission denied in /home/eagleclo/public_html/vendor/colinmollenhour/cache-backend-file/File.php on line 691
1 exception(s): Exception #0 (Exception): Warning: file_put_contents(/home/eagleclo/public_html/var/cache//mage-tags/mage---085_CONFIG): failed to open stream: Permission denied in /home/eagleclo/public_html/vendor/colinmollenhour/cache-backend-file/File.php on line 691 Exception #0 (Exception): Warning: file_put_contents(/home/eagleclo/public_html/var/cache//mage-tags/mage---085_CONFIG): failed to open stream: Permission denied in /home/eagleclo/public_html/vendor/colinmollenhour/cache-backend-file/File.php on line 691
#1 file_put_contents('/home/eagleclo/p...', '085_ADMINHTML__D...', 10) called at [vendor/colinmollenhour/cache-backend-file/File.php:691]
#2 Cm_Cache_Backend_File->_updateIdsTags(array('085_ADMINHTML__D...'), array('085_CONFIG', '085_MAGE'), 'merge') called at [vendor/colinmollenhour/cache-backend-file/File.php:203]
#3 Cm_Cache_Backend_File->save('a:319:{s:46:"Mag...', '085_ADMINHTML__D...', array('085_CONFIG', '085_MAGE'), NULL) called at [vendor/magento/zendframework1/library/Zend/Cache/Core.php:390]
#4 Zend_Cache_Core->save('a:319:{s:46:"Mag...', '085_ADMINHTML__D...', array('085_CONFIG', '085_MAGE'), NULL, 8) called at [vendor/magento/framework/Cache/Core.php:74]
#5 Magento\Framework\Cache\Core->save('a:319:{s:46:"Mag...', 'ADMINHTML::DICON...', array('085_CONFIG', '085_MAGE'), NULL) called at [vendor/magento/framework/Cache/Frontend/Adapter/Zend.php:63]
#6 Magento\Framework\Cache\Frontend\Adapter\Zend->save('a:319:{s:46:"Mag...', 'adminhtml::DiCon...',

and some time it is showing

Internal 500 error.