Magento – Magento2.3.2: Path “app/etc/” cannot be used with directory “/app/etc/”

I am working on Magento2.3.2

When I tried to enable cache types from the admin panel, I am getting the following error.

Path "/opt/bitnami/apps/magento/htdocs/app/etc/" cannot be used with directory "/opt/bitnami/apps/magento/htdocs/app/etc/"

I am not seeing any log also.

I tried changing all permissions by using the following commands

sudo find . -type d -exec chmod 755 {} \; 
sudo find . -type f -exec chmod 644 {} \;

After I used to run above commands, I am getting the following Fatal error:

Fatal error: Uncaught Zend_Cache_Exception: cache_dir
"/opt/bitnami/apps/magento/htdocs/var/page_cache" is not writable in
/opt/bitnami/apps/magento/htdocs/vendor/magento/zendframework1/library/Zend/Cache.php:209
Stack trace: #0
/opt/bitnami/apps/magento/htdocs/vendor/magento/zendframework1/library/Zend/Cache/Backend/File.php(180):
Zend_Cache::throwException('cache_dir "/opt…') #1
/opt/bitnami/apps/magento/htdocs/vendor/colinmollenhour/cache-backend-file/File.php(87):
Zend_Cache_Backend_File->setCacheDir('/opt/bitnami/ap…') #2
/opt/bitnami/apps/magento/htdocs/vendor/magento/zendframework1/library/Zend/Cache.php(153):
Cm_Cache_Backend_File->__construct(Array) #3
/opt/bitnami/apps/magento/htdocs/vendor/magento/zendframework1/library/Zend/Cache.php(94):
Zend_Cache::_makeBackend('Cm_Cache_Backen…', Array, true, true) #4
/opt/bitnami/apps/magento/htdocs/vendor/magento/framework/App/Cache/Frontend/Factory.php(156):
Zend_Cache::factory('Magento\Framewo…', 'Cm_Cache_Backen…',
Array, Array, true, true, true) #5 /opt/bit in
/opt/bitnami/apps/magento/htdocs/vendor/magento/zendframework1/library/Zend/Cache.php
on line 209