Re: libpq.so.2 problems

Ok - discovered the solution in pgsql-php, repeated below for reference:

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From: "Peter De Muer (Work)" <peter(dot)demuer(at)inter-networks(dot)be>
To: <pgsql-php(at)postgresql(dot)org>
Subject: Re: 7.3.1 update gives PHP libpq.so.2 problem
Date: Tue, 4 Feb 2003 14:06:04 +0100

try making a soft link libpq.so.2 to the libpq.so.3 file that comes
with
PHP 7.3.1.

regards,

pt3r
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End of quoted message

So (for me) its a case of:

cd /usr/lib
ln -s libpq.so.3 libpq.so.2