PHP SSL connection to MongoDB

[Michal_Giza (Michał Giza)]

Version of server is 4.4.3

[Rafael_Green]

so, it seems like your client version is not compatible with you server version
see this: https://docs.mongodb.com/drivers/php/#compatibility

[Michal_Giza (Michał Giza)]

Should I install newer PHP driver version?

[Rafael_Green]

yes, seems like you should
If you cant, you can try using lower version of mongodb server