Questão jurídica principal
Whether the appeal had to be entered into despite non-payment of the ordered cost advance and a late request for legal aid/installments.
Decisão extraída
No. The cost advance was not paid within the non-extendable grace period, and the request under Art. 48 BGG was filed only after the deadline.
Fundamentação extraída
Under Art. 62(3) BGG, failure to pay the advance within the set time allows non-entry; the late request could not cure the default. The matter was handled in simplified procedure under Art. 108(1)(a) BGG.