Error installing Magento 2.3.2: An abstract factory could not create an instance of magentoframeworkencryptionencryptor

I am installing magento 2 via a docker image :

quay.io/alexcheng1982/apache2-php7:7.2.12

I keep getting this message:

 An abstract factory could not create an instance of 
magentoframeworkencryptionencryptor(alias: 

MagentoFrameworkEncryptionEncryptor).

I understand from this question that the issue is caused by not having php-libsodium installed in my apache image

Consequently,following this comment, I added libsodium to the image:

I.e ;

RUN apt-get update -y
RUN apt-get install libsodium-dev -y
RUN docker-php-ext-install sodium

However I am still getting the error.

I checked my phpinfo() and indeed sodium has been added:

PHPINFO PAGE;

     sodium
sodium support  enabled
libsodium headers version   1.0.8
libsodium library version   1.0.8

Two question:

Is this indeed the cause of the problem?

If so, could the reason for the failure be that I did not install the latest version of libsodium. I note from the other question that version 1.0.17 was installed and this seemed to do the trick.

the version I installed is: 1.0.8

this is how i installed version 1.0.8

RUN apt-get update -y
    RUN apt-get install libsodium-dev -y
    RUN docker-php-ext-install sodium

is there a way to install a later version ?