I use php 5.6, both dlls are at:
C:\UniServerZ\core\php74\extensions\php_openssl.dll
C:\UniServerZ\core\php56\extensions\php_openssl.dll
part of apache error log when i use uniservice
[Wed Aug 12 09:07:44.619277 2020] [mpm_winnt:notice] [pid 5364:tid 688] AH00418: Parent: Created child process 5132
PHP Warning: PHP Startup: Unable to load dynamic library 'C:/UniServerZ/core/php56/extensions\\php_curl.dll' - The specified module could not be found.\r\n in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library 'C:/UniServerZ/core/php56/extensions\\php_openssl.dll' - The specified module could not be found.\r\n in Unknown on line 0
[Wed Aug 12 09:07:45.026827 2020] [mpm_winnt:notice] [pid 5132:tid 2516] AH00354: Child: Starting 150 worker threads.
instead, when i use UniController i get no error and pages work as intended.