Hi,
My domain suddenly stopped resolving about 48 hours ago,
No changes have been made to configuration that has been running fine for almost a year.

Any help would be appreciated.

Thanks.

What is the domain name?

If you are referring to domain name myhoose.online, it does not appear to be active at the registry level. The domain name may have expired. Below is the output of WHOIS query.

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See http://www.ripe.net/db/support/db-terms-conditions.pdf

% Note: this output has been filtered.
% To receive output for a database update, use the "-B" flag.

%ERROR:101: no entries found
%
% No entries found in source RIPE.

% This query was served by the RIPE Database Query Service version 1.99 (WAGYU)