I can get a non-stylized error page by going to any SQL tab (from the main page, any database, or any table) and running a query like select encrypt('foo'); then clicking the link (38794c423761353145642f3663) in the results.
select encrypt('foo');
The exact error varies depending on the context when clicking the SQL tab, but it's always presented in a non-PMA style.
Fixed with https://github.com/phpmyadmin/phpmyadmin/commit/34c2837894d712ae0148be6aad385d3b3f77995a
A more complete solution is https://github.com/phpmyadmin/phpmyadmin/commit/dc72faf6abcd8f5ea11ab1ffed0e5b954fb02b69
The exact error varies depending on the context when clicking the SQL tab, but it's always presented in a non-PMA style.
Fixed with https://github.com/phpmyadmin/phpmyadmin/commit/34c2837894d712ae0148be6aad385d3b3f77995a
A more complete solution is https://github.com/phpmyadmin/phpmyadmin/commit/dc72faf6abcd8f5ea11ab1ffed0e5b954fb02b69